Orco

Orco the Killer Whale (previously known as Shachee in Europe) is a large blue killer whale who Donkey Kong encounters in the game Donkey Kong Jungle Beat.

Generally Orco is found simply wandering around aimlessly, Donkey Kong can come up to Orco and grab on to its dorsal fin, Donkey Kong can then ride Orco. Like Enguarde the Swordfish, Orco can smash through underwater barriers, and can also leap out of the water and reach extreme heights.

Gender
Curiously, Orco has several smaller killer whales follow behind him, leading some to believe he is a female. However, Orco was referred to as a "he" in the manual for the New Play Control! version of Donkey Kong Jungle Beat. It is unknown if that was intentional, or if it was simply a mistake (since a similar situation occurred in Super Paper Mario, where Watt was mistakenly called a male).

Trivia

 * Orco's name is based off of the killer whale's official name, the Orca.