Gi tells Ma-Ti the shark he thought was attacking him during their swim on vacation was a plant-eater, but a Florida Keys local overhears and misunderstands part of their conversation and soon the town believes the beach is overrun by man-eating beasts. Argos Bleak takes advantage of the promises of a reward for someone who will keep the people safe by vowing to kill all sharks. Ma-Ti and Gi try to warn people that harming sharks will mean harming the environment when the animals they control become too populous, then attempt to stop Bleak's hunting, but they are captured. The other Planeteers fly out to meet them, but are shot into the ocean by Bleak. They have to stop his shark-hunting, especially after he intends to use the Planeteers as bait and unchecked numbers of jellyfish really do give the beach-goers something to fear attack from...
—brainybrailler@comcast.net