The protagonist of the story is Harry, one of a bunch of blueclaw crabs in Barnegat Bay. He is bullied by Spike, the biggest crab in the group, who has a plan to trick crabbers and saving them all from being caught. But Harry won't always be undersized, and eventually he has to stop being bulled and become a hero.
This story takes place at the New Jersey Shore, but it could take place in any East Coast bay where blueclaw crabs are hunted.