The manta ray (Manta birostris) is the largest species of the rays. The largest known specimen was more than 25 ft (7.6 m) across, with a weight of about 2,900 lb (1,300 kilograms). It ranges throughout waters of the world, typically around coral reefs. They have the largest brain-to-body ratio of the sharks, rays and skates (E.lasmobranchii).