The California Sea Lion (Zalophus californianus) is a coastal sea lion of western North America. Their numbers are abundant (188,000 U.S. stock 1995 est.), and the population continues to expand at a rate of approximately 5.0% annually. They are quite intelligent, can adapt to man-made environments, and even adult males can be easily trained. Because of this, California sea lions are commonly used for entertainment in circuses, zoos and marine parks; and are used by the US Navy for certain military operations. This is the classic circus “seal”, despite the fact that it is not a true seal.