Gentoos are black with a white belly. Their feet and bill are yellow and their eyes are brown. Their head is black with white triangular patches that meet over their eyes. They have a more prominent tail than other penguins. The males tend to be larger then the females but gender is very difficult to distinguish. Their life span in the wild is estimated to be 15-20 years. They are the third largest of all the penguin species and are known to be the most curious. In the water, sea lions, leopard seals, and orca are all predators of the gentoo. On land there are no predators of full grown gentoos. Skuas can steal their eggs and other seabirds will snatch chicks.