Three groups of predatory marine reptiles would seem to be more than enough for anybody to contend with. But marine reptiles weren’t the only shell breakers, and cephalopods weren’t the only victims. The perpetrators of the Mesozoic’s widespread shell predation were fish and sharks, crabs and lobsters, and even snails, taking no pity on their kin. They crunched, cracked, drilled, and pried their way into virtually every mollusk shell in the sea.
