Pseudorca crassidens is a toothed whale and can be recognised as such by the single blowhole and the presence of teeth. It is a member of the dolphin family with a characteristic prominent median notch in the flukes, a smooth crease-less throat and sharply pointed teeth. The false killer whale reaches up to 6 m in length. It has moderately long and slender, bent flippers and small tail flukes. The dorsal fin is tall, large and located on the middle of the back. The head is smoothly sloping without a snout. It is entirely black in colour.False killer whales are usually found in pairs or in groups up to several hundred individuals. Their surface behaviour is typical of dolphins with acrobatic leaps and bow-riding are not uncommon. Dive duration is unknown (Kinze, 2002).
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