Cunning Fish Use Polarized Light for Camouflage
Lookdowns manipulate polarized light to hide from predators.
It’s not easy to hide if you live in the open ocean. To avoid predators, some fish sport pale bellies and dark backs to blend in with the sky and the deep. Others are transparent. But evolutionary biologists at the University of Texas have discovered a true undersea camouflage expert: a fish that manipulates polarized light.
Humans generally can’t perceive light polarization, the parallel alignment of light waves, but many fish can. So can their predators. Curious if prey speci...