Prehensile tail? Bony plates? The two special sea creatures that have these characteristics are the sea horse and pipe fish; both currently living in a tank on our desk.
The Biomes Marine Biology Center of North Kingstown has lent an aquarium with the unique fishes along with a special diet to feed them with. There are two seahorses one of which is active, while the other likes to hide out by the filter. The one pipe fish likes to disguise itself as a piece of eel grass, but most everyone finds him.
The aquarium will be here for two weeks, but for a further marine life experience, MPL offers a discounted pass to the Biomes Center.