The shark makes one bite attack against a Large or smaller target it is grappling. If the attack hits, the target is swallowed, and the grapple ends. The swallowed target is blinded and restrained, it has total cover against attacks and other effects outside the shark, and it takes 14 (4d6) acid damage at the start of each of the shark's turns. The shark can hold up to two Large-sized or three Medium-sized or smaller creatures at a time. If the shark takes 30 damage or more on a single turn from a creature inside it, the shark must succeed on a DC 20 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, each of which falls prone in a space within 10 feet of the shark. If the shark dies, all swallowed creatures are no longer restrained by it and can escape from the corpse using 5 feet of movement, exiting prone.