Light organ photosensitivity in deep-sea shrimp may suggest a novel role in counterillumination

Danielle DeLeo, Heather Bracken-Grissom, Megan L. Porter, Tom Iwanicki, Jamie Sickles & Tamara M. Frank
Extraocular photoreception, the ability to detect and respond to light outside of the eye, has not been previously described in deep-sea invertebrates. Here, we investigate photosensitivity in the bioluminescent light organs (photophores) of deep-sea shrimp, an autogenic system in which the organism possesses the substrates and enzymes to produce light. Through the integration of transcriptomics, in situ hybridization and immunohistochemistry we find evidence for the expression of opsins and phototransduction genes known to play a...
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