Snacker

Snacker is a vicious enemy found in the waters of Treasure Trove Cove and Rusty Bucket Bay in Banjo-Kazooie. Although the water looks calm, if Banjo swims too far from shore (or within a fenced-in area in Rusty Bucket Bay), Snacker will appear from nowhere and chase him down, biting the bear if he catches up. Snacker swims much faster than Banjo can paddle, but he can be outrun by constantly jumping out of the water and using the Feathery Flap which will greatly increase your speed. If Banjo can reach safe land, the shark will lose interest within a few seconds and disappear.

Snacker is a constant threat while swimming and is quite hard to get rid of, but it can be done. Lure Snacker close to land and attack him as soon as he is within range: eggs fired from Kazooie's backside will do some damage and will send the shark belly-up after a few repeated attempts; the Beak Buster will also work well as long as you don't miss and fall in the water, but the Wonderwing is the only move which can deliver a one-hit KO. Defeating Snacker will yield three honeycombs and make the waters safely swimable for a while, but Snacker will respawn after a minute or two, so make your time count.

The Snacker in Treasure Trove Cove talks constantly, which itself can be more of an incentive to stay on land than the actual threat of being bitten. The Snacker in Rusty Bucket Bay never speaks, although it otherwise behaves exactly the same.

Trivia
In Rusty Bucket Bay, he appears slightly more greener than his Treasure Trove version, suggesting he is sickly and dirty.