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Great white shark (Carcharodon carcharias)
The mighty great white shark (Carcharodon carcharias) is often mistakenly thought of as the most voracious predator of the seas…
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Coelacanth (Latimeria chalumnae)
The coelacanth (Latimeria chalumnae) is a ‘living fossil’ previously believed to have gone extinct at the time of the dinosaurs until…
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Leafy seadragon (Phycodurus eques)
Leafy seadragons (Phycodurus eques) are exquisitely camouflaged fish. Belonging to the same family as seahorses and pipefish (Syngnathidae)…
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Queen triggerfish (Balistes vetula)
The deep-bodied queen triggerfish has suitably regal colouring; it is a flamboyant, and variable, mixture of blue, green and yellow, which…
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Southern bluefin tuna (Thunnus maccoyii)
The southern bluefin tuna (Thunnus maccoyii) is one of the largest bony fish in the world. The incredibly streamlined and powerful body is…
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Whale shark (Rhincodon typus)
The whale shark (Rhincodon typus) is the largest fish in the world; with its vast size it resembles the whales from which its common name is…
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Spotted handfish (Brachionichthys hirsutus)
The spotted handfish (Brachionichthys hirsutus) is one of the world's most endangered marine fish. This extremely distinctive fish is…
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Pygmy seahorse (Hippocampus bargibanti)
The pygmy seahorse (Hippocampus bargibanti) is undoubtedly one of the most well camouflaged species in the oceans, being extremely…
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Frilled shark (Chlamydoselachus anguineus)
The little-known, deepwater-dwelling frilled shark (Chlamydoselachus anguineus) is one of the most primitive species of living shark…
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Basking shark (Cetorhinus maximus)
The basking shark (Cetorhinus maximus) is the second largest fish in the seas, after the whale shark (Rhincodon typus); its maximum…
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European eel (Anguilla anguilla)
The European eel (Anguilla anguilla) has a very unusual and fascinating life cycle. Adults have long, narrow bodies, with a continuous…
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Humphead parrotfish (Bolbometopon muricatum)
The largest of all parrotfish, the humphead parrotfish (Bolbometopon muricatum) is an olive or blue-green to slate-grey fish, with a…
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Giant manta ray (Manta birostris)
The largest living ray and one of the largest of all elasmobranchs, the giant manta ray (Manta birostris) is a stunning and graceful member…
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Pike (Esox lucius)
The pike (Esox lucius) is probably the coarse anglers’ most sought-after fish. It is predatory both in nature and appearance. The fish has a…
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Great hammerhead (Sphyrna mokarran)
The massive and well-known great hammerhead (Sphyrna mokarran) has the most distinctive hammer of its genus. It is particularly wide and…
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Sunfish (Mola mola)
Not only is the sunfish (Mola mola) the world’s heaviest bony fish, with some individuals weighing in at a staggering 2.3 tonnes, but…
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Atlantic salmon (Salmo salar)
The Atlantic salmon (Salmo salar), 'the leaper', has been called the king of fish, due primarily to its spectacular ability to clear…
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Bowmouth guitarfish (Rhina ancylostoma)
Named for its distinctive mouth which undulates like a longbow, this deep-bodied guitarfish is unmistakable. The species has a broad…
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Oceanic whitetip shark (Carcharhinus longimanus)
The oceanic whitetip shark (Carcharhinus longimanus) has a stocky build, a short, bluntly-rounded snout, and incredibly powerful jaws. This…
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Smalltooth sawfish (Pristis pectinata)
The smalltooth sawfish gets its name from the Greek word ‘pristis’, meaning saw and the small teeth that line the edges of its saw, which…
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Yellowfin tuna (Thunnus albacares)
The yellowfin tuna (Thunnus albacares) is a fish built for speed and endurance. Its streamlined body is metallic dark blue on the back…
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Tiger shark (Galeocerdo cuvier)
One of the largest sharks in the world, the tiger shark (Galeocerdo cuvier) is named for the characteristic, vertical striped markings that…
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Yangtze sturgeon (Acipenser dabryanus)
A prehistoric-looking fish, the Yangtze sturgeon has a long and slender body covered with rough skin and bony plates. A pointed snout…
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Humphead wrasse (Cheilinus undulatus)
The humphead or Napoleon wrasse (Cheilinus undulatus) is one of the largest reef fishes in the world and is the largest member of the wrasse…
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Common seahorse (Hippocampus kuda)
A relatively large species, the common seahorse (Hippocampus kuda) is unfortunately not as common as its name suggests, and is considered…
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Leopard shark (Stegostoma fasciatum)
The leopard shark is an immediately recognisable, stunningly attractive species, which derives its common name from its distinctive markings…
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River lamprey (Lampetra fluviatilis)
Lampreys are some of the most primitive vertebrates alive today. They are known as cyclostomes, which means 'round mouths' and refers to the…
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Swordfish (Xiphias gladius)
A fast-swimming predator, the swordfish (Xiphias gladius) gets its name from its extremely long, flat, sword-like bill, which is…
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Arapaima (Arapaima gigas)
The arapaima (Arapaima gigas), or pirarucu as it is known in Brazil, is one of the largest freshwater fishes in the world. Its local name…
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Ribbontailed stingray (Taeniura lymma)
The colourful ribbontailed stingray (Taeniura lymma) is immediately recognisable by the large, bright, iridescent blue spots that adorn its…
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Red-bellied piranha (Pygocentrus nattereri)
Often feared because of its seemingly aggressive and frenzied attacks, the red-bellied piranha (Pygocentrus nattereri) has a reputation…
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Shortfin mako (Isurus oxyrinchus)
The shortfin mako (Isurus oxyrinchus) is believed to be the fastest-swimming of all sharks, thought to be capable of attaining bursts of…
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Beluga (Huso huso)
The beluga (Huso huso) is the largest sturgeon in the world and the largest European freshwater fish; it can reach up to five metres in…
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Anglerfish (Lophius piscatorius)
The various names for this fish - anglerfish (Lophius piscatorius), monkfish, goosefish - point to the fact that it has a very…
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Megamouth shark (Megachasma pelagios)
The megamouth shark (Megachasma pelagios) is one of the most mysterious and least understood of all the sharks. It was first recorded…
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Three-spined stickleback (Gasterosteus aculeatus aculeatus)
The stickleback is a well-known fish, and is the archetypal 'tiddler', the first small fish caught by many school children. It is a small…
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Spotted eagle ray (Aetobatus narinari)
The spotted eagle ray is very distinctive with a flattened body and triangular corners to the wing-like pectoral fins. The snout is rounded…
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Blacktip reef shark (Carcharhinus melanopterus)
The blacktip reef shark (Carcharhinus melanopterus) is the most commonly encountered species of shark in tropical Indo-Pacific reefs…
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Albacore tuna (Thunnus alalunga)
The large, oceanic albacore tuna (Thunnus alalunga) is built for speed, with a torpedo-shaped body, smooth skin and streamlined fins…
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Porbeagle (Lamna nasus)
The porbeagle is a stout, heavy shark with a pointed, conical snout and a crescent-shaped caudal, or tail, fin. Its name is thought to…
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Sharptooth lemon shark (Negaprion acutidens)
The big, stocky sharptooth lemon shark (Negaprion acutidens) looks almost identical to the lemon shark (Negaprion brevirostris), but…
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Rainbow parrotfish (Scarus guacamaia)
The rainbow parrotfish (Scarus guacamaia) is the largest herbivorous fish in the Atlantic, with males growing to lengths of 1.2 metres…
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Green sawfish (Pristis zijsron)
The green sawfish is a ray, with a shark-like body and a striking elongated snout, known as a saw. This saw bears 23-37 pairs of teeth and…
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Pacific angel shark (Squatina californica)
Superficially, the Pacific angel shark resembles a large ray more than a shark, due to its remarkably flat body and huge, wing-like pectoral…
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Big-belly seahorse (Hippocampus abdominalis)
The big-belly seahorse is one of the largest of all seahorses, growing up to 35 cm in length. Like other seahorses, the head is held at…
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Atlantic goliath grouper (Epinephelus itajara)
The Atlantic goliath grouper (Epinephelus itajara) is one of the largest members of the sea bass family. Its body is large and stocky…
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Salmon shark (Lamna ditropis)
A formidable hunter, the salmon shark (Lamna ditropis) is sometimes mistaken for the white shark (Carcharodon carcharias), but can…
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Common carp (Cyprinus carpio)
The carp that occurs in Britain today is the most commercially important freshwater fish kept in ponds, and has been selectively bred for…
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Thresher shark (Alopias vulpinus)
With their enormous, curving upper lobe of the tail fin, which can be as long as the body, thresher sharks (Alopias vulpinus) are one of the…
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Bull shark (Carcharhinus leucas)
The bull shark (Carcharhinus leucas), named for its stocky body and ferocious reputation, is most famous for its remarkable ability to…