For fish in the inky blackness, colours abound

Genetic
research reveals previously unknown vision proteins in deep sea species.
Stephen Fleischfresser reports.

The tub-eye fish (Stylephorus chordatus) was found to use five different rod opsins within its eyes. The long cylindrical shape of the eyes increases light capture and also enables the fish to move them from a horizontal to a vertical position. 

The tub-eye fish (Stylephorus chordatus) was found to use five different rod opsins within its eyes. The long cylindrical shape of the eyes increases light capture and also enables the fish to move them from a horizontal to a vertical position.