Bonnethead most negatively buoyant of marine vertebrates. The shark feeds primarily on crustaceans, consisting mostly of blue crabs, but also shrimp, mollusks, and small fish. Its feeding behavior involves swimming across the seafloor, moving its head in arc patterns like a metal detector, looking for minute electromagnetic disturbances produced by crabs and other creatures hiding in the sediment. Upon discovery, it sharply turns around and bites into the sediment where the disturbance was detected. If a crab is caught, the bonnethead shark uses its teeth to grind its carapace and then uses suction to swallow. To accommodate the many types of
Creature Catalogue Creature Catalogue Creature Catalogue is a supplement for Basic "Dungeons & Dragons" first released in 1986, and updated in 1993. The "Creature Catalogue" is a supplement which describes over 200 monsters, most of which had been collected from "D&D" rules and modules, as well as 80 new monsters which had never been printed before; each monster is illustrated and indexed by habitat. In "Creature Catalogue" is collected all the creatures first presented in the official "D&D" adventure modules to that time, plus many new creatures and some converted from "AD&D". Also included is a comprehensive index of all "D&D" monsters