Ages toddler and upwards. With text approved by the animal authorities at SeaWorld, photographs provided by the parks, and with the well-known SeaWorld brand on the cover, the marine animals series is sure to be a big seller. To begin thieseries are the dolphins -- the clowns of the sea; the sea lions -- the clowns of circuses everywhere; the killer whale -- made cuddly by Shamu the star of SeaWorld; and the adorable penguins -- birds in formal attire with a funny waddle.