Scopelarchus analis
Species of ray-finned fish
From Wikipedia, the free encyclopedia
Scopelarchus analis, the short fin pearleye or blackbelly pearleye,[1] is a species of ray-finned fish that can be found circumglobal in warm waters.[2] It is a member of the Scopelarchus, a genus of pearleyes.
| Scopelarchus analis | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Aulopiformes |
| Family: | Scopelarchidae |
| Genus: | Scopelarchus |
| Species: | S. analis |
| Binomial name | |
| Scopelarchus analis (Brauer, 1902) | |
| Synonyms | |
|
Dissomma anale Brauer, 1902 | |
Size
This species reaches a max length of 12.6 cm (4.96 in).[3]
Biology
It has a unique cylindrical eye that it is directed dorsally. This allows the fish to gain a binocular view of the water column above.[4] The fish also possesses a unique adaptation where it has multiple retinae. The primary retina is located at the base of the cylinder, an accessory retina along the nasal wall, and between the two is a retinal diverticulum.[4]