Polluted water: It’s where sea snakes wear black

A reptile may be an evolutionary counterpart to dark moths in sooty areas

turtle-headed sea snake

DARK MARK  This dark form of a turtle-headed sea snake is shedding its skin, and maybe some toxic trace metals along with it.

C. Goiran

Maybe it’s more than reptile fashion. The high percentage of citified sea snakes wearing black might be a sign that pollution is an evolutionary force.