Turbo Shark

The Turbo Shark, also known as the Speed Shark in Europe and Australia, is a Medium kart in Koopa Kart Wii and Koopa Kart 8. It resembles a shark with wheels attached to its sides. Its bike counterpart is the Whale Watcher. It can be unlocked by winning the 50cc Spiny Shell Cup. It is the Koopa Kart counterpart to the Super Blooper.

Description
"The Turbo Shark is basically what you'll get if you turn Jaws into a kart. This ocean ride features good Speed and Off-Road, though with poor Drift. You'll win the 50cc Spiny Shell Cup for this kart, won't you?" - Koopa Kart Wii in-game description