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.
After their failed attempt to gain control of a land Zone, Nesbitt was one of the citizens keen to make a go of things without corrupt Zone Leader Sharka Khan.
Crab Sea Nesbitt is an obvious parody of comedy character Rab C. Nesbitt.