These fast-swimming dolphins are highly active (1), often leaping clear of the water (breaching), and slapping their flippers on the water surface (lobtailing) (3). They occur in large groups (3) of between 10 and 500 individuals (1), the size of group depending on both the time of day and year (3). The approach of these groups can be detected from miles away (1), and some noises made by this species can be heard from above the surface of the water (3). They feed on small fish and cephalopods such as squid (1), and are known to use co-operative methods of hunting (4). They make short dives typically of between 10 seconds and 2 minutes, but dives lasting for as long as 8 minutes have been recorded (3).