Hippos are large, semi-aquatic mammals with a barrel-shaped body, short legs, and a large head. They have gray or brownish-gray skin, with pinkish areas around their eyes, mouth, and ears. Hippos are ...

Their huge wings allow them to glide on air currents while expending minimal energy, enabling them to spend long periods at sea. They feed on fish, squid, and krill, and can even drink salty seawater.

Marine biologist Carrie Newell photographed four blue whales — the largest animals on Earth — 3 miles off Depoe Bay.