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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. [4] Four-eyed fish have only two eyes, but the eyes are specially adapted for their surface-dwelling lifestyle.
Anablepidae is a family of ray-finned fishes which live in brackish and freshwater habitats from southern Mexico to southern South America. [2] There are three genera with sixteen species: the four-eyed fishes (genus Anableps), the onesided livebearers (genus Jenynsia) and the white-eye, Oxyzygonectes dovii.
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 ...
Indonesia is a country with vast amount of freshwater fish species; it is the country with the third-largest number of freshwater fish species in the world, with a total of 1155 species. And about 440 species are endemic to Indonesia. This makes Indonesia as the 4th country with the largest endemic freshwater fish species, with Brazil (1716 ...
The foureye butterflyfish's first instinct when threatened is to flee, putting the false eye spot closer to the predator than the head. Most predators aim for the eyes, and this false eye spot may in automimicry trick the predator into believing that the fish will flee tail first. Other potential functions of the eye spot exist.
Eye close-up of P. hamrur. At sexual maturity the size of Priacanthus hamrur reaches 18–19 cm (7.1–7.5 in) in males, 19.1–20.0 cm (7.5–7.9 in) in females, [1] but males can reach a maximum length of 45 cm. [2] The body of the Crescent-tail Bigeye is relatively deep, strongly compressed laterally.
The Asian arowana (Scleropages formosus) comprises several phenotypic varieties of freshwater fish distributed geographically across Southeast Asia. [3] While most consider the different varieties to belong to a single species, [4] [5] [6] [3] [7] work by Pouyaud et al. (2003) [8] differentiates these varieties into multiple species.