The pilot whale is either of two species of cetacean in the genus Globicephala. The genus is part of the oceanic dolphin family (Delphinidae) although their behaviour is closer to that of the larger whales. The two species are the Long-finned Pilot Whale and the Short-finned Pilot Whale. The two are not readily distinguished at sea and are typically just known simply as Pilot Whales or Calderón in Spanish. They and other large members of the dolphin family are also known as blackfish. WIKIPEDIA