Bathylychnops exilis
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Bathylychnops exilis, the Javelin spookfish, is a species of barreleye found in the northern Pacific and in the eastern Atlantic Ocean near the Azores where it is found at depths of around Script error: No such module "convert".. This species grows to a length of Script error: No such module "convert". SL.[1]
The species is notable for unusual protuberances that grow from its eyes, which each have "a well developed lens"[2] and a retina, and which have led to the species being called a "four-eyed" fish.[2] They have two spherical eyes that are dorsally directed and two secondary eyes that are ventrally directed.[3] It has been suggested that the purpose of these extra eyes is detection of threats from below, since these eyes point downwards.[4] The Javelin spookfish have a distinct and advantageous secondary globe to their eyes. They use mirrors to collect and focus light, instead of a lens to divert the path of light. This feature provides great benefits in their chances for survival.[5][6]
References
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- ↑ a b Pearcy WG, Meyer SL, Munk O (1965). A 'Four-Eyed' Fish from the Deep-Sea: Bathylychnops exilis Cohen, 1958. Nature 207, 1260-1262.
- ↑ Partridge, J. C., et al. “Reflecting Optics in the Diverticular Eye of a Deep-Sea Barreleye Fish (Rhynchohyalus Natalensis).” Proceedings: Biological Sciences, vol. 281, no. 1782, 2014, pp. 1–9. JSTOR, http://www.jstor.org/stable/43601696. Accessed 18 Mar. 2023.
- ↑ Dawkins R (2009). The Greatest Show on Earth: The Evidence for Evolution. London: Bantam Press.
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