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Threatened Fish
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Threatened Fish
Species
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350
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Airsac catfish (
Heteropneustes microps
)
The peculiar looking airsac catfish, known from only a few specimens, is an air-breathing, freshwater fish. A long air sac that...
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1 Image
0 Videos
Ala balik (
Salmo platycephalus
)
Information on the ala balik is currently being researched and written and will appear here...
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1 Image
0 Videos
Albacore tuna (
Thunnus alalunga
)
This large, oceanic fish is built for speed, with a torpedo-shaped body, smooth skin and streamlined fins. The albacore tuna...
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1 Image
0 Videos
Amistad gambusia (
Gambusia amistadensis
)
Information on the Amistad gambusia is currently being researched and written and will appear here...
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2 Images
0 Videos
Angel shark (
Squatina squatina
)
With its exceptionally flat body and large pectoral fins, the angel shark resembles a large ray more than a shark. Its skin...
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8 Images
0 Videos
Anguila ciega (
Ophisternon infernale
)
Like many cave-dwelling species, the Anguila ciega, otherwise known as the blind swamp eel, has lost its eyes and pigmentation...
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5 Images
0 Videos
Apron (
Zingel asper
)
Information on the apron is currently being researched and written and will appear here...
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1 Image
0 Videos
Arabian killifish (
Aphanius dispar
)
Information on the Arabian killifish is currently being researched and written and will appear here...
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3 Images
0 Videos
Arapaima (
Arapaima gigas
)
The arapaima, or pirarucu as it is known in Brazil, is one of the largest freshwater fishes in the world. Its local name derives...
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6 Images
3 Videos
Asian arowana (
Scleropages formosus
)
Information on the Asian arowana is currently being researched and written and will appear here...
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1 Image
0 Videos
Asian sheepshead wrasse (
Semicossyphus reticulatus
)
One of the largest wrasses, the Asian sheepshead wrasse is an extraordinary pinkish-grey fish with large, swelling-like protrusions...
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1 Image
0 Videos
Atlantic halibut (
Hippoglossus hippoglossus
)
A highly sought after food fish, the Atlantic halibut is the largest flatfish in the world. Flatfish exhibit a unique and...
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4 Images
1 Video
Atlantic whitefish (
Coregonus huntsmani
)
A member of the salmon and trout family (Salmonidae), the Atlantic whitefish has a typical salmon-like appearance, but can...
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4 Images
0 Videos
Banded neolebias (
Neolebias lozii
)
Discovered as recently as 1993, this small, rare fish is only found in two streams within the Upper Zambezi River floodplain...
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2 Images
0 Videos
Banded pipefish (
Doryrhamphus dactyliophorus
)
Information on the banded pipefish is currently being researched and written and will appear here...
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10 Images
0 Videos
Banggai cardinalfish (
Pterapogon kauderni
)
With its striking patterning and elegant, elongated fins, it is easy to understand why the Banggai cardinalfish has become...
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11 Images
0 Videos
Barred danio (
Danio pathirana
)
Information on the barred danio is currently being researched and written and will appear here...
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1 Image
0 Videos
Barren's topminnow (
Fundulus julisia
)
Discovered as recently as 1982, the Barren's topminnow is considered to be one of the most endangered fish species in eastern North...
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3 Images
0 Videos
Basking shark (
Cetorhinus maximus
)
The basking shark is the second largest fish in the seas, after the whale shark (Rhincodon typus); its maximum size is thought...
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12 Images
5 Videos
Bastard sturgeon (
Acipenser nudiventris
)
Information on the bastard sturgeon is currently being researched and written and will appear here...
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2 Images
0 Videos
Beluga (
Huso huso
)
The beluga is the largest sturgeon in the world and the largest European freshwater fish; it can reach up to 5 metres in length....
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3 Images
1 Video
Betta (
Betta burdigala
)
Information on Betta burdigala is currently being researched and written and will appear here...
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1 Image
0 Videos
Betta (
Betta livida
)
Information on Betta livida is currently being researched and written and will appear here...
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1 Image
0 Videos
Betta (
Betta persephone
)
Information on Betta persephone is currently being researched and written and will appear here...
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2 Images
0 Videos
Betta (
Betta simplex
)
Information on Betta simplex is currently being researched and written and will appear here...
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3 Images
0 Videos
Big skate (
Raja binoculata
)
Aptly named, the big skate is the largest skate in North American waters. As with all skates, the body is flattened and disc-shaped...
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7 Images
0 Videos
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...
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11 Images
1 Video
Bigeye tuna (
Thunnus obesus
)
This large, fast-swimming tuna is an important target for numerous commercial fisheries around the world. The streamlined body...
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3 Images
0 Videos
Black Sea shad (
Alosa immaculata
)
Information on the Black Sea shad is currently being researched and written and will appear here...
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1 Image
0 Videos
Black cod (
Epinephelus daemelii
)
Information on the black cod is currently being researched and written and will appear here...
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1 Image
0 Videos
Black sea bass (
Stereolepis gigas
)
As implied by its alternative name of giant sea bass, the most dramatic feature of this fish is its conspicuous size, with the...
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7 Images
0 Videos
Black-arse cod (
Epinephelides armatus
)
Information on the black-arse cod is currently being researched and written and will appear here...
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2 Images
0 Videos
Blacksaddled coral grouper (
Plectropomus laevis
)
Like other groupers, this rather wary, coral reef-dwelling fish is a large, robust species. It may be one of two colour forms: the...
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4 Images
0 Videos
Blackspot tuskfish (
Choerodon schoenleinii
)
Information on the blackspot tuskfish is currently being researched and written and will appear here...
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7 Images
0 Videos
Blackspotted torpedo (
Torpedo fuscomaculata
)
Information on the blackspotted torpedo is currently being researched and written and will appear here...
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1 Image
0 Videos
Blacktip reef shark (
Carcharhinus melanopterus
)
This is the most commonly encountered species of shark in tropical Indo-Pacific reefs. Its medium-sized, streamlined body...
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18 Images
1 Video
Blacktip shark (
Carcharhinus limbatus
)
The black tip shark is a large, stout shark, with a long, pointed snout and small eyes. Its torpedo-shaped body, grey...
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13 Images
1 Video
Blind shark (
Brachaelurus waddi
)
This small, stout shark gets its name from its habit of retracting its eyeballs, which causes its thick eyelids to close, when...
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7 Images
0 Videos
Blotchside logperch (
Percina burtoni
)
Information on the blotchside logperch is currently being researched and written and will appear here...
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3 Images
0 Videos
Blue shark (
Prionace glauca
)
The blue shark is easily identified by its beautifully coloured slender body, which is a deep indigo-blue across the back, shading...
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14 Images
4 Videos
Blue shiner (
Cyprinella caerulea
)
Information on the blue shiner is currently being researched and written and will appear here...
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4 Images
0 Videos
Blue-spotted stingray (
Taeniura lymma
)
This colourful stingray is immediately recognisable by the large, bright, iridescent blue spots that adorn its oval, elongated...
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26 Images
4 Videos
Bluespotted bamboo shark (
Chiloscyllium plagiosum
)
Information on the bluespotted bamboo shark is currently being researched and written and will appear here...
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3 Images
0 Videos
Bluntnose six-gill shark (
Hexanchus griseus
)
As its common name alludes, the bluntnose six-gill shark has a characteristically blunt rounded snout and six long gill slits...
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6 Images
2 Videos
Bocaccio rockfish (
Sebastes paucispinus
)
Information on the bocaccio rockfish is currently being researched and written and will appear here...
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1 Image
0 Videos
Boesman's rainbowfish (
Melanotaenia boesemani
)
Information on the Boesman's rainbowfish is currently being researched and written and will appear here...
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3 Images
0 Videos
Bonytail chub (
Gila elegans
)
Information on the bonytail chub is currently being researched and written and will appear here...
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3 Images
0 Videos
Boulder darter (
Etheostoma wapiti
)
Information on the boulder darter is currently being researched and written and will appear here...
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2 Images
0 Videos
Bowmouth guitarfish (
Rhina ancylostoma
)
Named for its distinctive mouth which undulates like a longbow, this deep-bodied guitarfish is unmistakable. The species has...
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4 Images
0 Videos
Bramble shark (
Echinorhinus brucus
)
The most unusual feature of this sluggish shark is the sharp tooth-like denticles scattered over its body and fins. A stout-bodied...
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6 Images
0 Videos
Species
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Latest news
3rd November 2009: IUCN Red List of Threatened Species - Extinction crisis continues.
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What's new in ARKive
An image of the Extinct longnose stubfoot toad.
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Fascinating footage of red kangaroo thermoregulation.
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The only known images of the Critically Endangered Eskimo curlew.
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Rare camera trap images of Diard's clouded leopard.
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Rare images of the Critically Endangered cao-vit crested gibbon.
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Under the Sea
Dusky dolphins are inquisitive creatures, as seen here investigating a southern right whale.
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The giant clam is the largest species of bivalve mollusc on fossil record and can weigh up to 300kg.
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The basking shark is the second largest fish in the sea, reaching up to 10 metres in length.
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Leafy seadragons hatch from the male and will reach maturity within 2 years of life.
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Since the megamouth shark's discovery, only 17 sightings have been recorded of this elusive fish.
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