Of the animals listed, you can find sea lions on the Galapagos Islands. The Galapagos sea lion is a distinct species native to the islands, known for their playfulness and presence on the beaches year-round. Elephants, ostriches, and yaks are not found on the Galapagos Islands. These animals are native to other continents and environments. So, among elephants, sea lions, ostriches, and yaks, only sea lions are found in the Galapagos Islands.