Scopelarchus analis

Scopelarchus analis
Scientific classification
Domain:	Eukaryota
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

Scopelarchus analis, the short fin pearleye, is a species of fish that can be found circumglobal in warm waters.^[1] It is a member of the Scoperlarchus, a genus of pearleyes.

Size

This species reaches a max length of 12.6 cm (4.96 in).^[2]

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.^[3] 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.^[3]

References

^ Davis, Matthew P. (March 2015). "Evolutionary Relationships of the Deep-Sea Pearleyes (Aulopiformes: Scopelarchidae) and a New Genus of Pearleye from Antarctic Waters". Copeia. 103 (1): 64–71. doi:10.1643/CI-14-139. ISSN 0045-8511.
^ Johnson, Robert Karl (1974). "Five New Species and a New Genus of Alepisauroid Fishes of the Scopelarchidae (Pisces: Myctophiformes)". Copeia. 1974 (2): 449–457. doi:10.2307/1442536. ISSN 0045-8511.
^ a b Pointer, Marie A.; Carvalho, Livia S.; Cowing, Jill A.; Bowmaker, James K.; Hunt, David M. (2007-08-15). "The visual pigments of a deep-sea teleost, the pearl eye Scopelarchus analis". Journal of Experimental Biology. 210 (16): 2829–2835. doi:10.1242/jeb.006064. ISSN 1477-9145.

[1] Davis, Matthew P. (March 2015). "Evolutionary Relationships of the Deep-Sea Pearleyes (Aulopiformes: Scopelarchidae) and a New Genus of Pearleye from Antarctic Waters". Copeia. 103 (1): 64–71. doi:10.1643/CI-14-139. ISSN 0045-8511.

[2] Johnson, Robert Karl (1974). "Five New Species and a New Genus of Alepisauroid Fishes of the Scopelarchidae (Pisces: Myctophiformes)". Copeia. 1974 (2): 449–457. doi:10.2307/1442536. ISSN 0045-8511.

[:0-3] Pointer, Marie A.; Carvalho, Livia S.; Cowing, Jill A.; Bowmaker, James K.; Hunt, David M. (2007-08-15). "The visual pigments of a deep-sea teleost, the pearl eye Scopelarchus analis". Journal of Experimental Biology. 210 (16): 2829–2835. doi:10.1242/jeb.006064. ISSN 1477-9145.