What will I see at the Reef Drop-off? The Reef Drop-off, for its first 50m, is the habitat for many reef fish who find shelter on the Reef Face and eat the plankton in the nearby sea. The Reef Face is usually the richest habitat. Its complex growths of coral provide cracks and crevices for protection, and the abundant invertebrates and algae offer an ample source of food. Fish that cruise the boundaries of the Reef Drop-off include predators, such as pompanos, groupers, certain types of shark, and barracudas. If you are lucky enough to have seagrass meadows nearby you will see mackerel, snapper, porgies and grunts. Herbivorous and plankton-eating fish include fusilier, ray, chromis, and the nocturnal squirrelfish and cardinalfish.