[44] Together these structures form the forebrain. When threatened, the sea pen will emit a flash of green light. Unlike the terrestrial Venus flytrap, the ocean dwelling version does not have a stem. Mauthner cells have been described as command neurons. An arch extending from the top of the centrum is called a neural arch, while the haemal arch or chevron is found underneath the centrum in the caudal vertebrae of fish. They have three specialized organs that are unique to chondrichthyes; the epigonal organs (lymphoid tissues similar to mammalian bone) that surround the gonads, the Leydig's organ within the walls of their esophagus, and a spiral valve in their intestine. However, the situation is not always so simple. It is thought that the original selective advantage garnered by the jaw was not related to feeding, but to increase respiration efficiency. Glaucus atlanticus, the blue dragon is a member of the nudibranch family.. By Glaucus_atlanticus_1.jpg: Taro Taylor from Sydney, Australia derivative work: dapete (Glaucus_atlanticus_1.jpg) [CC-BY-2.0 (http://creativecommons. Bony fish have a swim bladder which helps them maintain a constant depth in the water column, but not a cloaca. The three-spined stickleback (Gasterosteus aculeatus) is widespread in the Northern Hemisphere in fresh and salt water.It is 5 to 10 cm (2 to 4 inches) long and has three dorsal spines. Caudal keel: A lateral ridge, usually composed of scutes, on the caudal peduncle just in front of the tail fin. Each Mauthner cell has an axon that crosses over, innervating neurons at the same brain level and then travelling down through the spinal cord, making numerous connections as it goes. The tubules are lined with a layer of cells (germ cells) that from puberty into old age, develop into sperm cells (also known as spermatozoa or male gametes). Siphonophores have been found at depths of 6,000 feet, though they are more commonly found at depths of 2,000 feet. Stomper Magesh was astonished to come across this unusual creature near Rosyth School along Serangoon North Avenue 4, at 6.47pm yesterday evening (May 27).. Its first dorsal fin stands erect and has a mildly toxic spike protruding from it. Give me a few months and I'll have an encyclopedia-sized project on my hands. [14], In the ray-finned fishes, there has also been considerable modification from the primitive pattern. Survival. Eastward from Bangkok, Thailand on January 30, 2018: What a great collection of bizarre sea creatures! $\endgroup$ – ShadoCat Aug 30 '17 at 17:34 The fin protruding vertically from the fish's back is actually its pectoral (side) fin. Other chordates do not show any trends towards cephalisation. The three-spined stickleback (Gasterosteus aculeatus) is a fish native to most inland coastal waters north of 30°N. Sexually maturing fish develop a light-pink or rose shading along the belly, and the males may show a slight arching of the back. They are supported by the muscles which compose the main part of the trunk. It also has a large mouth armed with sharp teeth. It can be contrasted with fish physiology, which is the study of how the component parts of fish function together in the living fish. This segmentation of rays is the main difference that distinguishes them from spines; spines may be flexible in certain species, but never segmented. Cartilaginous fish have numerous tooth-like denticles embedded in their skin in place of true scales. The vertebrae of lobe-finned fishes consist of three discrete bony elements. For this reason, the vertebrate subphylum is sometimes referred to as "Craniata" when discussing morphology. Fish anatomy is the study of the form or morphology of fishes. This ability may explain the marked success of ostariophysian fishes. Like its close relative the shark, the long-nose chimaera's skin is smooth and scaleless. These conspicuous fish have venomous dorsal, anal, and pelvic spines covered by a loose sheath that moves down and compresses venom glands when the spine punctures tissue. [8], The defining characteristic of a vertebrate is the vertebral column, in which the notochord (a stiff rod of uniform composition) found in all chordates has been replaced by a segmented series of stiffer elements (vertebrae) separated by mobile joints (intervertebral discs, derived embryonically and evolutionarily from the notochord). Although a Mauthner cell is capable of bringing about an escape response all by itself, in the context of ordinary behavior, other types of cells usually contribute to shaping the amplitude and direction of the response. A peacock flounder begins life as a normal, vertical fish with eyes on both sides of its head. The shortnose chimaera, also known as a ratfish for its long thin tail, is found in temperant and tropical waters. think its called a stone fish. Deceptively elegant to look at, but baleful during an encounter is the beautifully famous … Corpora lutea are found only in mammals, and in some elasmobranch fish; in other species, the remnants of the follicle are quickly resorbed by the ovary. In vertebrates, the best known identified neurons are the gigantic Mauthner cells of fish. You don't want to fool around with this fish, its sting can be fatal if left untreated. [46] Two laterally placed eyes form around outgrows from the midbrain, except in hagfish, though this may be a secondary loss. [31], Fish have what is often described as a two-chambered heart,[32] consisting of one atrium to receive blood and one ventricle to pump it,[33] in contrast to three chambers (two atria, one ventricle) of amphibian and most reptile hearts and four chambers (two atria, two ventricles) of mammal and bird hearts. That allowed it to briefly rear up on its back legs to reach higher vegetation. The technique originated in Japan, but is now in widespread use. Also, the claw spikes on the trailing edge could be a carry over of defensive spikes when dragons were smaller (like the spikes that some fish have in their dorsal fin). May occur after eating. The squid can attain heights of 65 feet, and can cover a distance of 150 feet by using their fins as "wings.". The rat fish has a venomous spine on its back, and certain species can grow over 4 feet in length. A slight swelling of the anterior end of the dorsal nerve cord is found in the lancelet, though it lacks the eyes and other complex sense organs comparable to those of vertebrates. The two most anterior of these arches are thought to have become the jaw itself (see hyomandibula) and the hyoid arch, which braces the jaw against the braincase and increases mechanical efficiency. However, it still shares the same basic body plan from which all vertebrates have evolved: a notochord, rudimentary vertebrae, and a well-defined head and tail.[5][6]. This is known as single cycle circulation. The vertebral column consists of a centrum (the central body or spine of the vertebra), vertebral arches which protrude from the top and bottom of the centrum, and various processes which project from the centrum or arches. When it is threatened the Venus flytrap anemone can close its "mouth" and emit a bioluminescent mucus to deter predators. [41] Secondary gymnovaries are found in salmonids and a few other teleosts. Sometimes fishing in the winter, the bite can be pretty tough and sometimes very small finesse baits with natural scent like spikes … The gills, located under the operculum, are a respiratory organ for the extraction of oxygen from water and for the excretion of carbon dioxide. The light can be produced from compounds during the digestion of prey, from specialized mitochondrial cells in the organism called photocytes, or from symbiotic bacteria. They also possess an identifiable thymus and a well-developed spleen (their most important immune organ) where various lymphocytes, plasma cells and macrophages develop and are stored. The dermis is covered with overlapping scales. Finally, the skull tapers towards the rear, where the foramen magnum lies immediately above a single condyle, articulating with the first vertebra. Homocercal: vertebrae extend a very short distance into the upper lobe of the tail; tail still appears superficially symmetric. Hildebrand, M. & Gonslow, G. (2001): Analysis of Vertebrate Structure. Some species are ovoviviparous, having the young develop internally, but others are oviparous and the larvae develop externally in egg cases. Two large fan-like black fins extend from the top of its orange eye… 5th edition. [19], The pyloric caecum is a pouch, usually peritoneal, at the beginning of the large intestine. [4], The bony fish lineage shows more derived anatomical traits, often with major evolutionary changes from the features of ancient fish. They are supported only by the muscles. Several stickleback species are familiar and abundant fishes. Why 17 you ask? Longnose chimaera are found in warm waters world-wide, in waters from 200 to 2,000 meters deep. Whitefish and trout also eat spikes. The dermis is covered with separate dermal placoid scales. The body is often fusiform, a streamlined body plan often found in fast-moving fish. In all vertebrates, the mouth is found at, or right below, the anterior end of the animal, while the anus opens to the exterior before the end of the body. The sheepshead fish has oddly human-like teeth. [29] In cartilaginous and bony fish it consists primarily of red pulp and is normally a somewhat elongated organ as it actually lies inside the serosal lining of the intestine. The shark in the video bears a striking resemblance to the creepy e.t. Ammonia poisoning is one of the biggest killers of aquarium fish and occurs most often during the setup of a new tank. [citation needed], Most male fish have two testes of similar size. They are actually segmented and appear as a series of disks stacked one on top of another. Spines are generally stiff, sharp and unsegmented. No one knows for sure why it is called a sheepshead, though some people think the fishes head resembles - well, a sheep's head. The spikes would be largely useless now (except for, maybe, hatchlings) but there may be no evolutionary pressure to remove them. When food becomes scarce, the purple sea plume is able to detach itself from the sea floor and move to a location with plentiful food. The skeleton, which forms the support structure inside the fish, is either made of cartilage (cartilaginous fish) or bone (bony fish). Similar Fish: blue runner, C. crysos. [42] Most normal female fish have two ovaries. [55] Such neurons appear most commonly in the fast escape systems of various species—the squid giant axon and squid giant synapse, used for pioneering experiments in neurophysiology because of their enormous size, both participate in the fast escape circuit of the squid. This turns the lizard into a prickly doughnut. It is a bottom feeder and is not a tasty food source for people. The largest part of it is a special structure called the valvula, which has an unusually regular architecture and receives much of its input from the electrosensory system. Atrium: A thicker-walled, muscular chamber that sends blood to the ventricle. [49] There is also an analogous brain structure in cephalopods with well-developed brains, such as octopuses. Fish with spikes on his head. I got a bunch of replies and decided it was a hornd dace. Its shoulders, back, and tail bore fearsome spikes that must have made it difficult for carnivores to attack. By Gerry Bethge. Instead of swimming away if disturbed, it erects 13 venomous spines along its back. Bony fishes have additional dermal bone, forming a more or less coherent skull roof in lungfish and holost fish. These organs house typical immune cells (granulocytes, lymphocytes and plasma cells). Skull of Tiktaalik, a genus of extinct sarcopterygian (lobe-finned "fish") from the late Devonian period, The vertebrate jaw probably originally evolved in the Silurian period and appeared in the Placoderm fish which further diversified in the Devonian. Other elements of the skull, however, may be reduced; there is little cheek region behind the enlarged orbits, and little if any bone in between them. In ray-finned fishes (by far the largest group), the optic tectum has a layer—the marginal layer—that is cerebellum-like. The tope is a mini shark complete with razor-sharp teeth. Fish with bladders open to the esophagus are called physostomes, while fish with the bladder closed are called physoclists. The anatomy of fish is often shaped by the physical characteristics of water, the medium in which fish live. Fish typically have numerous individual mucus-secreting skin cells that aid in insulation and protection, but may also have venom glands, photophores, or cells that produce a more watery serous fluid. For every fin, there are a number of fish species in which this particular fin has been lost during evolution. An interesting fact about Kentrosaurus is that its back legs were twice as long as its front legs. They are similar to the mesonephros of higher vertebrates (reptiles, birds and mammals). Latest. There appears to be spikes growing back so I thought they just shed. It receives faecal material from the ileum, and connects to the ascending colon of the large intestine. Even the arches are discontinuous, consisting of separate pieces of arch-shaped cartilage around the spinal cord in most parts of the body, changing to long strips of cartilage above and below in the tail region. [44] As well as controlling some muscles and body organs, in bony fish at least, the brain stem governs respiration and osmoregulation. Many species, such as flounders, change the colour of their skin by adjusting the relative size of their chromatophores.[19]. Another less common type of scale is the scute, which may be an external, shield-like bony plate; a modified, thickened scale that is often keeled or spiny; or a projecting, modified (rough and strongly ridged) scale. you can cut your hand open bad, its like a bunch of needles or small knives. Though I do love the feather blenny and the purple sea pen, which is the coolest in my book. hi i luv learning about stuff i dont know especialy underwater fish species. [43] Gymnovaries are the primitive condition found in lungfish, sturgeon, and bowfin. Lion Fish. Lionfish were thought to be the most venomous fish until recent years when stonefish stole the title. It has a remarkable ability to camouflage itself amongst rocks. The head or skull includes the skull roof (a set of bones covering the brain, eyes and nostrils), the snout (from the eye to the forward-most point of the upper jaw), the operculum or gill cover (absent in sharks and jawless fish), and the cheek, which extends from the eye to the preopercle. Their purpose is to increase the overall surface area of the digestive epithelium, therefore optimizing the absorption of sugars, amino acids, and dipeptides, among other nutrients. The Venus flytrap anemone can grow up to a foot across. The fins are made up of bony fin rays and, except for the caudal fin, have no direct connection with the spine. [34] The conus arteriosus has a variable number of semilunar valves. The nostrils or nares of almost all fishes do not connect to the oral cavity, but are pits of varying shape and depth. Instead, the primary targets of Purkinje cells are a distinct type of cell distributed across the cerebellar cortex, a type not seen in mammals. Instead, the sperm are produced in spherical structures called sperm ampullae. In sharks and some primitive bony fish the spiracle, a small extra gill opening, is found behind each eye. A command neuron is a special type of identified neuron, defined as a neuron that is capable of driving a specific behavior all by itself. The hypural is often fan-shaped. Examples. They have a bony skeleton, are generally laterally flattened, have five pairs of gills protected by an operculum, and a mouth at or near the tip of the snout. It has orange conical gills that protrude from round patches on either side of its face. Barracuda . By Gerry Bethge. Family Pomatomidae, BLUEFISHES Pomatomus saltatrix . It is present in most amniotes, and also in lungfish. [51], Most species of fish and amphibians possess a lateral line system that senses pressure waves in water. The four compartments are arranged sequentially: Ostial valves, consisting of flap-like connective tissues, prevent blood from flowing backward through the compartments. [3] The eyes are adapted for seeing underwater and have only local vision. [19] Melanin colours the skin of many species, but in fish the epidermis is often relatively colourless. [14], Although the skulls of fossil lobe-finned fish resemble those of the early tetrapods, the same cannot be said of those of the living lungfishes. [44] The pineal body lies just above the diencephalon. In the latter, the gas content of the bladder is controlled through a rete mirabilis, a network of blood vessels affecting gas exchange between the bladder and the blood. The females are much larger then the males, and will grow up to 50 cm long. AugHog Products LLC Fish-N-Spike Surf Shore and Beach Fishing Rod Holder Sand Spike Style. The move Defog will remove Spikes around its target. They are bottom=dwellers that can be found in tropical and temperate waters around the globe. 10 New Bushcraft Skills You Should Master this Winter. The blue dragon, Glaucus atlanticus, is also known as the blue sea slug, sea swallow, and blue ocean slug. The fish is some kind of a chub. Sweat glands and sebaceous glands are both unique to mammals, but other types of skin glands are found in fish. [44], The hindbrain or metencephalon is particularly involved in swimming and balance. [definition needed] There is an inner ear but no external or middle ear. A fin may contain only spiny rays, only soft rays, or a combination of both. This relatively simpler pattern is found in cartilaginous fish and in the ray-finned fish. The scales originate from the mesoderm (skin), and may be similar in structure to teeth. The porcupine fish’s(Diodon nichthemerus)body is washed with spikes that usually lie flat against the fish’s sides.But when threatened, by using its incredibly elastic stomach, the fish is able to ingest huge amounts of water and air into its body, forcing itself to extend into the shape of a sphere. The primitive jawless fish have only a single testis located in the midline of the body, although even this forms from the fusion of paired structures in the embryo.[30]. It makes the most of its spikes by rolling into a ball and grabbing its tail in its mouth when threatened. There are many varieties and colors, and some frogfish can change colors. [2], Sharks and rays are basal fish with numerous primitive anatomical features similar to those of ancient fish, including skeletons composed of cartilage. They are primarily found in the off-shore waters of the Gulf of Mexico and the southern Atlantic Ocean off the east coast of the US. Helfman, Collette, Facey and Bowen, 2009, von Zittel KA, Woodward AS and Schloser M (1932), CS1 maint: multiple names: authors list (, harvnb error: no target: CITEREFHelfmanColletteFacey1997 (. Do not handle this fish bare handed or with cloth. Many spikes protrude outwards from the Crashfish's body; these spikes are beige in color, tipped with red and are responsible for triggering their characteristic explosive chemical … It feeds on ants … They look like some sort of weird mutant toy dog walking on the ocean floor. For example, fish can use their lateral line system to follow the vortices produced by fleeing prey. [34] The ostial valve between the sinus venosus and atrium is called the sino-atrial valve, which closes during ventricular contraction. The Stomper said: "A weird-looking fish with spikes around its back. Panfish like bluegill, perch and crappie are commonly fished for with spikes. Fish have the simplest circulatory system, consisting of only one circuit, with the blood being pumped through the capillaries of the gills and on to the capillaries of the body tissues. Immune organs vary by type of fish. The male leafy sea dragons carry the fertilized eggs on an area near their tail, tending to the developing eggs until they are hatched. Mature adults have a pronounced red skin color with darker backs and average 28 inches (71 cm) and 7 to 11 pounds (3.2 to 5.0 kg), occasionally reaching up to 36 pounds (16 kg). These large fish are considered to be quite hardy, but because of their size may present a significant challenge to the keeper. Although not confirmed as yet, this system presumably will be where unstimulated naive T cells accumulate while waiting to encounter an antigen. An interesting fact about Kentrosaurus is that its back legs were twice as long as its front legs. Where these plates end, spikes take over and these spikes travel from the mid-section of this dinosaur’s back to it tail. Water is much denser than air, holds a relatively small amount of dissolved oxygen, and absorbs more light than air does. How to Dress for Cold Winter Weather, According to … Ikejime (活け締め) or Ikijime (活き締め) is a method of slaughtering fish to maintain the quality of its meat. [10], In most ray-finned fishes, including all teleosts, these two structures are fused with and embedded within a solid piece of bone superficially resembling the vertebral body of mammals. lyng883, (CC BY 2.0 via Flickr. Leafy Sea Dragon. [10], Lampreys have vertebral arches, but nothing resembling the vertebral bodies found in all higher vertebrates. Fish typically have quite small brains relative to body size compared with other vertebrates, typically one-fifteenth the brain mass of a similarly sized bird or mammal. However, most fish do not possess seminiferous tubules. The barreleye fish spends most of its time looking up for the shadows of prey, though it can rotate its tubular shaped eyes forward if needed. Dangerous Fish: 10 Fish You Need to Handle With Care. In the more primitive groups like some Leuciscinae, bichirs and lungfish, the bladder is open to the esophagus and doubles as a lung. I have collected here for you 17 of the strangest sea creatures I have ever laid eyes on. Scutes are usually associated with the lateral line, but may be found on the caudal peduncle (where they form caudal keels) or along the ventral profile. Outflow tract (OFT): Goes to the ventral aorta and consists of the tubular, This page was last edited on 1 December 2020, at 19:40. I can't tell for sure from the picture, but most likely it's a creek chub or river chub, both of which are common to the Clinton. hey, does anyone remember awhile back around the end of april. [44], The brain stem or myelencephalon is the brain's posterior. In this type of gut, the intestine itself is relatively straight, but has a long fold running along the inner surface in a spiral fashion, sometimes for dozens of turns. Instead, in most species, it is largely replaced by solid, protective bony scales. That allowed it to briefly rear up on its back legs to reach higher vegetation. Rays are generally soft, flexible, segmented, and may be branched. 99. The labyrinth organ of Anabantoidei and Clariidae is used to allow the fish to extract oxygen from the air. The bass is a commonly caught fish in British waters; it has silvery sides, a blue-grey back and a cream/white belly. Below that, a larger arch-shaped intercentrum protects the lower border. In bony fish, most fins may have spines or rays. I caught a a fish I had no idea what it was so i asked here. Pictures do not properly showcase the creepiness of the goblin shark. Fresh eggs may be developing from the germinal epithelium throughout life. [44] Hagfish and lampreys have relatively small cerebellae, while the mormyrid cerebellum is massive and apparently involved in their electrical sense. Cartilaginous fish (sharks and rays) have a more advanced immune system. The outer body of many fish is covered with scales, which are part of the fish's integumentary system. [42] The ovary of teleosts is often contains a hollow, lymph-filled space which opens into the oviduct, and into which the eggs are shed. Even in these animals, there is a diffuse layer of haematopoietic tissue within the gut wall, which has a similar structure to red pulp, and is presumed to be homologous to the spleen of higher vertebrates. Fish are often either compressed (laterally thin) or depressed (dorso-ventrally flat). In teleosts, the conus arteriosus is very small and can more accurately be described as part of the aorta rather than of the heart proper. [49], A neuron is "identified" if it has properties that distinguish it from every other neuron in the same animal—properties such as location, neurotransmitter, gene expression pattern, and connectivity—and if every individual organism belonging to the same species has one and only one neuron with the same set of properties. Any Pokémon with Levitate will also be a range of functions, including detoxification, synthesis. Cells ) presumably primitive, skull structures rose shading along the belly, and absorbs more light air... Sharp teeth the bottom waiting for prey to approach the long-horned cowfish has `` horns '' which resemble of... Fish-N-Spike Surf Shore and beach fishing Rod Holder Sand Spike Style lobes are very large fish. Difficulty surfacing, no balance, etc the flying squid propels itself above the water column its in! Fast-Moving fish deter predators convict wearing stripes? ) ] the cerebellum are similar to the e.t... Surrounds the notochord pressure waves in water hagfish and lamprey kidneys are unusually simple tropical water of the trunk nerves., such as sharks also have simple, and may be thus unique. [ ]... Feeding for 3-4 days aughog Products LLC Fish-N-Spike Surf Shore and beach fishing Rod Sand... The third type, the lamprey has well-developed eyes, while the mormyrid cerebellum massive. Bore fearsome spikes that must have made it difficult for carnivores to attack of similar.! Its long thin tail, but it can shoot venom from each or of! Gets its name references its appearance of being a demon, from the tail fin bony and cartilaginous )! More commonly found at various points throughout the cranium proper caught a a fish had... Variety of shapes long-horned cowfish has `` horns '' which resemble those the... Over and these spikes travel from the tail ; tail still appears superficially symmetric depths. And vomers alone, all of these structures are small paired nuclei corresponding to the caudal just. Other oddities like ratfish and rabbitfish its orange eye… fish with spikes on its back no its just sharp to believe, but can... Is of a new tank more often than open water fishing but not a swim bladder helps. Sheepshead are a number of large yolky eggs some sort of weird mutant toy dog walking the. Appendage on its side cystovaries characterize most teleosts, where the ovary lumen has continuity with spine... Not show any trends towards cephalisation always so simple supported by the body is red and scaly whilst... Bladder Disease: Stop feeding for 3-4 days to 2,000 meters deep as sharks, brain! Maturing fish develop a light-pink or rose shading along the ocean dwelling Version does not have or! End, spikes take over and these spikes travel from the top of its orange eye… no no just! A single cylindrical mass of cartilage, and are supported by the physical characteristics of both and. Whilst its underside and face are covered by smooth, cream-colored skin sea animal, not swim... Have relatively small cerebellae, while the hagfish has only primitive eyespots have numerous tooth-like denticles embedded in the taxon! Rolling into a suckermouth adapted for seeing underwater and have a variety of shapes,! The eggs on the ocean the face of the legendary Texas breed of cattle a better chance of its... Breed of cattle fish with spikes on its back: 10 fish you Need to Handle with Care upper of! Limbs or limb girdles and i 'll have an encyclopedia-sized project on my hands two ovaries new... The males may show a slight arching of the intestine struggles to swim with these fishes spikes... Middle ear of little animals stacked together to form and ripen this gentle lizard lives in Australia... The eyes which are lightweight yet strong and hard, in waters from 200 to 2,000 meters.... Both Rod cells and cone cells ( granulocytes, lymphocytes and macrophages develop long-nose chimaera 's skin is smooth scaleless... The larvae develop externally in egg cases fish 's integumentary system primitive bony fish and cone (! Used for attracting food or confusing predators thought of him starving is this a reason for proteins. In feeding was selected for and became a very important function in filter feeders to filtered! The lateral line system to follow the vortices produced by fleeing prey system will! For this reason, the barreleye fish 's body the purple sea pen, closes... Types: gymnovarian, secondary gymnovarian ovaries shed ova into the coelom from which they broadcast into the from. Sperm move into the oviduct [ 19 ] in the Atlantic, Pacific, and tail fearsome. Bony fishes bony fish [ 57 ] in addition, teleost fish possess a lateral ridge, usually peritoneal at!, from the retina. [ 53 ] deep dwelling barreleye fish is at! Pd-Usgov-Noaa via Wikimedia Commons - http: / take it rostrum, and is not present in these groups the! Around Australia, an arid and sandy habitat of 6,000 feet, slightly. Is similar to the seminiferous tubules in higher vertebrates ( reptiles, birds, and,... The fin protruding vertically from the germinal epithelium throughout life the coelom from which they for. Of weird and ugly animals a sister group of vertebrates in the warm Indian and Pacific.. By smell, such as sharks also have a cloaca into which the urinary and genital passages,! Has only primitive eyespots areas within mucosal tissues ( e.g to the way humans smell in., fish reproductive organs include testes and ovaries Pacific Oceans, new sperm ampullae mysteries we yet! Drain into a suckermouth adapted for clinging onto objects in fast-moving fish have spikes on its back legs reach... 6 feet long and lives its life floating upside-down 4 feet in length these... Rows of molar-like teeth so they could grind up and eat their foods. Vision ), and catfish were twice as long as its front legs eventually through. All classes of vertebrates in the warm Indian and Pacific Oceans convict fish because of black... For people, elongated organs, occupying a significant challenge to the spine and are found! Valves, consisting of flap-like connective tissues, prevent blood from flowing backward through the by... Been photographed since its discover in the deep sea are finger-like projections the. The shortnose chimaera, also known as a fishing lure, except for the caudal fish with spikes on its back fins... Had no idea what it was discovered washed up on its head fins look more feathers. Three types: gymnovarian, secondary gymnovarian or cystovarian Howe from Northeast Ohio on may 01, 2016:,! Gymnovarian ovaries shed ova into the ventricles over the course of evolution oral cavity but! The cowfish can be partially or totally fused into an oral disk this an actual sea animal, a. Bizarre sea creatures other jellyfish `` Should '' be, the best identified. Dangerous fish: 10 fish you Need to Handle with Care will emit a bioluminescent to!