Their coat is also lighter in color relative to males. Coat color ranges from a fair brown to yellow in color with some pale markings around the head. Pups do not exhibit this brown color until about a month after they are born. When born, their ventral side is greyish orange and their dorsal side is black. This coat later turns into a dark chocolate brown color.
Sexual dimorphism is shown in pups as well as in adults.
They feed on fish, cephalopods, crustaceans, and other invertebrates depending on local abundance. These sea lions are typically found hunting in shallower waters, not more than five miles from shore. When looking for prey that travel in schools they hunt in groups. When they catch fish, they usually shake the prey in the air and then sometimes eat it whole. Reproduction Otaria byronia are known for their polygynous lifestyle.