There are many species of small birds, but most of the larger common Latin American types are absent. Few freshwater fish are native, but North American trout have been successfully introduced into the Andean lakes. Owing to the vicinity of the Humboldt Current, ocean waters abound with fish and other forms of marine life, which in turn support a rich variety of waterfowl, including several penguins. Whales are abundant, and some six species of seals are found in the area.