Deep-sea crabs grab grub using UV vision: Some crabs on the sea floor can see UV light and use the ability to select healthy food
Thursday, September 6, 2012 - 08:01
in Biology & Nature
Crabs living half-a-mile down in the ocean, beyond the reach of sunlight, have a sort of color vision combining sensitivity to blue and ultraviolet light. Their detection of shorter wavelengths may give the crabs a way to ensure they grab food, not poison.