Sharkfood Island
A secret underwater island in Treasure Trove Cove in Banjo-Kazooie. It raises either once you've entered in the cheat "OUTOFTHESEAITRISESTOREVEALMORESECRETPRIZES". On the XBL arcade version, it automatically raises if you have a Banjo-Kazooie: Nuts and Bolts save file
Sharkfood Island contains a Stop 'N' Swop egg