NEW YORK, April 25 (UPI) -- The contrast of a catshark's bright green biofluorescence increases at greater ocean depths, and as new research shows, is most obvious at the depths where other members of the species are most likely to be found.
Scientists already knew about the catshark's glow-in-the-dark appearance, but the latest discovery suggests their biofluorescence serves communication purposes -- a revelation for the team of researchers from the American Museum of Natural History.