The Octonauts decided to take a rest on a beach island until they find a wounded crab there. Peso helps it as the crab explains to him that "a blob" has taken over their home as two sets of anemones engage in a war of stinging each other for ownership of the crab's home. Peso stops the war by telling the anemones on the left to live on the left, and the same for the anemones on the right. The crabs shared the middle, and the Octonauts had a yummy picnic.