Known as the false killer whale, this pseudorca crassidens looked especially pleased with its disguise.
One of the largest members of the killer whales’ oceanic dolphin family, it also feeds on fish, squid and occasionally other marine mammals. Although it often benefits from its resemblance to the fearsome killer whale, this specimen presented a friendlier outlook while swimming in the waters off Hawaii.
Females can reach a maximum known size 5.1m (16ft) and weigh 1,200kg (2,600 lb), while the largest males can reach 6.1m (20ft) and weigh as much as 2,200kg (4,900 lb).
The pseudorca population is thought to have fallen sharply in the region over recent years. It was listed as “endangered” under the American Endangered Species Act in November 2012.