Reaching lengths of over 12 m (40 ft) and weights of over 21 tons, the Whale Shark is the world´s largest fish. However, despite its formidable name and size, this marine giant is a filter feeder – in order to eat, it juts out its enormous jaws and passively filters everything in its path. The largest recorded whale shark was measured at 12.65 m (41.5 ft).