All members of the Galapagos Sea Lions have brown or grey fur, females generally being a lighter shade than males, and newborn pups are chestnut brown. The sea lions have a smooth and streamlined body shape, making them efficient hunters, especially of sardines which are their main prey. They can dive to depths of up to almost 600 metres and can stay underwater for over ten minutes. They spend a lot of their time resting on beaches or playing, and are generally inquisitive.
The Sea Lions are very docile and generally spend a lot of their lives sleeping on the beach, but a dispute can erupt every so often. Generally the rest of the colony pays little attention to the scrap.