Crab Sea Nesbitt is a resident of the underwater Zone of Trituna. Nesbitt, a dangerous crab, was one of the warriors sent to the Beanson Coast Zone to fight Sonic the Hedgehog. Unfortunately for him, he was defeated by Sonic simply running around him. Even so, he pointed out the weaknesses of Jimmy Whale, suggesting he should have stuck to Underwater Boxing.
Crab Sea Nesbitt is an obvious parody of comedy character Rab C. Nesbitt.