Visual Spectral Sensitivity of the Bioluminescent Deep-Sea Mysid, Gnathophausia ingens
The spectral sensitivity of the deep-sea mysid, Gnathophausia ingens (Family Lophogastridae), was measured by electroretinography on intact specimens. High sensitivity to orange light was found. This was an unexpected result for a species whose adult members are never found above 400 m. Results of chromatic adaptation and silent substitution experiments were not compatible with either a one pigment or dual pigment visual system, making this one of the more unusual visual systems ever described.
Tamara M. Frank and James F. Case. 1988. Visual Spectral Sensitivity of the Bioluminescent Deep-Sea Mysid, Gnathophausia ingens .Biological Bulletin , (2) : 274 -283. https://nsuworks.nova.edu/occ_facarticles/464.