False Killer Whale

The false killer whale is an oceanic dolphin, black or dark grey and slightly lighter below, and the only living member of its genus. It reaches a maximum length of about 6 m; females reach 4.5–5 m and 1,200 kg and males 6 m and 2,200 kg, so males are about 10–15% larger. Newborns are 1.5–2.1 m long, and sexual maturity comes at 8–11 years (Wikipedia, general species account).

It is found in oceans worldwide but mainly in the tropics. It typically eats squid and fish but has also been known to eat other dolphins, and it takes fish from fisheries lines, where the two species prefer different fish. It is a deep diver, to at least 927 m, and can reach about 30 km/h. It forms close bonds, and non-aggressive associations, with other dolphins including bottlenose, pilot and melon-headed whales, and it echolocates using its melon.