Marine Iguana (Amblyrhynchus cristatus)
Location: Galapagos Islands
Fun facts: Although the Galapagos Islands are on the equator, they are bathed by the chilly Humboldt Current, which flows northward along the west coast of South America. Being a reptile, the marine iguana cannot generate its own body head and needs special adaptations for feeding in these conditions. When it dives, its heart rate drops by about half, helping it conserve energy to keep its core temperature higher than the water around it. At night, the iguanas often huddle together to keep themselves warm.