Gloop

Gloop is a friendly blue fish from Clanker's Cavern in Banjo-Kazooie. He supplies Banjo with air in the form of bubbles while the bear tries to raise Clanker by swimming through a key deep under water. He blows sequences of bubbles followed by a short rest.

Many players believe that the fish found in Hailfire Peaks that is needed to feed Boggy could in fact be Gloop because of its striking resemblance to the bubble-blowing fish.

Interestingly, Gloop cannot free Clanker despite swimming through the key needed to free him.