Scared Simon is a Sperm Whale that scared of everything including diving down into deep waters, but Peso taught him how not to be afraid of it. Unlike real sperm whales, he has teeth on his top jaw as well as his bottom jaw.
While learning how to dive, Peso gets trapped inside a giant clam. Simon gets scared, but he then comes down to pick up the clam Peso was in. Captain Barnacles and Kwazii free Peso, and Simon puts the clam down to the deep sea.