Dolphins are fast-swimming animals related to Whales and porpoises. Sleek and powerful swimmers found in all seas, Dolphins are distinguished from porpoises by well-defined, beak-like snouts and conical teeth. There are at least 32 species of Dolphins. Typical examples are the bottle-nosed Dolphin and the common Dolphin, which inspired many Mediterranean folk legends. Several freshwater species inhabit river estuaries in Asia and South America. The small, graceful tucuxi Dolphin has been sighted more than 2,000 km (more than 1,250 mi) up the Amazon River. The tucuxi, the smallest Dolphin, is less than 1.2 m (less than 4 ft) long; the largest, the bottle-nosed Dolphin, reaches a length of 3 m (10 ft). The Killer Whale is considered a Dolphin despite its much greater length of 9 m (30 ft). The pilot Whale is also considered a type of Dolphin.
The Dolphin is tough for its size, fast, and provides the only way to get the sonic attack ability in lower research levels. Rely on this useful creature to provide effective ranged support at lower levels.