Next, the authors compared their stickleback results to previously published opsin genes in two related species of fish (bluefin killifish and black bream), separated from sticklebacks by millions of years, that had also adapted to blackwater and clearwater habitats. (sciencedaily.com)
The animal does so by using the same family of light - sensitive proteins called opsins found in its eyes — a process not previously described for cephalopods. (sciencedaily.com)
«This is conclusive evidence that these animals, the Cnidaria, have light sensitivity based on this kind of opsin and transduction, just as we do,» says Dan Nilsson of the University of Lund in Sweden, who has also investigated hydras» light reception. (newscientist.com)