Cheepskipper

Cheepskipper is the boss of World 3 in the game New Super Mario Bros.

Cheepskipper is a purple and white Cheep-Cheep with yellow fins and specks. The fish also has a large mouth with two large canine teeth.

During the battle with Cheepskipper, the boss would leap out of the water onto the bridge, where it would have to be stomped three times. Normal Cheep-Cheeps would launch themselves at Mario (or Luigi) as well. These small fish were swift and attacked in large numbers, making them hard to dodge.

After Mario defeated Cheepskipper, he headed to World 5.

Trivia

 * Cheepskipper's character design bears a huge resemblance to the Boss Basses of Super Mario Bros 3.