Hold Breath. The crocodile can hold its breath for 15 minutes.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft, one target. Hit: 3-7-12 1d10+2 Piercing Damage, and the target is grappled (escape DC 12). Until this grapple ends, the target is restrained, and the crocodile can't bite another target.