A fairly robust dolphin with a short, rounded snout, Peale’s dolphin is greyish black above and mostly white below. A curved, light grey flank patch runs from below or ahead of the dorsal fin to the tail, while a second light grey thoracic patch runs from the eye to the middle of the body. Most feeding appears to occur in kelp beds, where small groups of around 5 to 30 individuals are thought to hunt squid, octopus, and sometimes shrimps. Larger groups have also been observed, and may hunt cooperatively in more open water, ‘herding’ larger shoals of fish. Peale’s dolphin occurs in open coastal waters over shallow continental shelves, as well as in bays, inlets, channels and around islands. Although recorded at depths of up to 300 m, the species prefers shallower coastal waters
Commerson's dolphin can be found in shallow waters along the southernmost tip of South America and around the Kerguelen Islands in the Indian Ocean. They are characterized by their striking black and white patterns, stocky body shape, small and indistinct rostrum and their bold, outgoing behaviour. Being dolphins, they are quite active and can swim very quickly, usually around the surface of the water. Commerson's are active breachers, and may breach repeatedly in a short period of time. They may even surf, riding breakers close to shore or heavy swells out at sea and may engage in swimming upside-down or spinning while swimming. This dolphin species is believed to be very migrational, following fish in the winter time that are moving to warmer waters.
Dusky dolphins are a curious species; they favour bow riding and seem to enjoy contact with boats and people. They are extremely agile swimmers and are known for their acrobatics. They are medium sized dolphins with sloping faces with no dominant beak nose, dark gray on their backs and white on their bellies. They are found throughout the southern hemisphere, inhabit cool waters and prefer waters that are less than 650 feet deep. They often form groups of 6 to 15 individuals and also are known to form feeding aggregations of several hundred individuals. Off South America, prey found in the stomachs of dusky dolphins include horse mackerel, hake, and sardines. Stomach contents of dusky dolphins in New Zealand revealed a diet of Hoki and squids.