A seaside town wants the sharks dealt with after an attack. Your players oblige. Then fish populations collapse, coral dies, storm surges devastate coastlines, and something sealed in the reef prison for eons starts rising to the surface. Reef Sharks aren't threats - they're ecosystem keystones. Remove them and watch the consequences cascade. This entry explores sharks as worldbuilding tools: prison guardians, merfolk pets (complete with Lost Shark posters), hunting companions, and reminders that not everything in the Monster Manual needs to die.