The Galápagos sea lion (Zalophus wollebaeki), is a species of sea lion that exclusively breeds on the Galápagos island and-in smaller numbers-on Islam de la plata (Ecuador), and they're an endangered species. Their loud bark, playful nature, and graceful agility in water make hem the "welcoming party" of the islands, and they are often spotted sun-bathing on sand shores, or rock groups, or gliding gracefully through the surf. When wet, sea lions are a shade of dark brown, but once dry, their color varies greatly. The females tend to be a lighter shade than the males and the pups a chestnut brown. Born with a longer, brownish-black lanugo, a pup's coat gradually fades to brown within the first five months of life. At this time, they undergo their first molt, resulting in their adult coat. Feeding mostly on sardines, Galápagos sea lions sometimes travel 10 to 15 kilometers from coast over the span of days to hunt for their prey.