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The four-eyed fish eye. 1.Underwater retina 2.Lens 3. Air pupil 4. Tissue band 5. Iris 6. Underwater pupil 7. Air retina 8. Optic nerve. The maximum length of four-eyed fishes is up to 32 cm TL in A. microlepis, making this species the largest in the order Cyprinodontiformes.
Anableps anableps, the largescale four-eyes, [3] is a species of four-eyed fish found in fresh and brackish waters of northern South America and Trinidad. This species grows to a length of 30 centimetres (12 in) total length (TL). This fish can occasionally be found in the aquarium trade. The fish does not actually have four eyes.
The finescaled four-eyed fish (Anableps microlepis) is a species of four-eyed fish found in coastal waters of the Atlantic Ocean from Trinidad and Tobago down to southeastern Brazil. [3] [4] [5] They mostly inhabit brackish environments such as estuaries, mangrove swamps, and tidal mudflats. It grows to approximately 30 cm (12 in) in length. [3 ...
The species gets its common name from a large dark spot on the rear portion of each side of the body. This spot is surrounded by a brilliant white ring, resembling an eye. A black vertical bar on the head runs through the true eye, making it hard to see. [2] This pattern may result in a predator confusing the back end of the fish for the front ...
The Pacific four-eyed fish (Anableps dowei) is a species of four-eyed fish native to the coastal waters on the Pacific side of southern Mexico to Nicaragua. [3] This fish is gregarious and inhabits mangrove swamps , tidal mudflats , and other coastal brackish ecosystems.
[8] [27] Coelacanths are large, plump, lobe-finned fish that can grow to more than 2 m (6.6 ft) and weigh around 90 kg (200 lb). [28] They are estimated to live up to 100 years, based on analysis of annual growth marks on scales, and reach maturity around the age of 55; [ 29 ] the oldest known specimen was 84 years old at the time of its ...
Four-eyed fish: The four-eyed fish feeds at the surface of the water with eyes that allow it to see above and below the surface at the same time. Four-eyed fish have two specially-adapted eyes which are raised above the top of their head. The eyes are divided in two different parts, and the fish floats at the water surface with only the lower ...
Of all evaluated fish species, 3.6% are listed as near threatened. The IUCN also lists seven fish subspecies as near threatened. Of the subpopulations of fish evaluated by the IUCN, ten species subpopulations have been assessed as near threatened. This is a complete list of near threatened fish species and subspecies evaluated by the IUCN.