Skippyjack

Skippyjacks are a blue type of fish found in The Legend of Zelda: Phantom Hourglass catchable while fishing. Their name is a play on, and they are the smallest and weakest of the catchable fish, discounting the Stowfish, being only sometimes longer than two feet. They appear in all four seas from the smaller fish shadows, and are extremely common. According to their information blurb, they are also considered quite tasty.