Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 3) piercing damage. Swallow. The axolotl makes one bite attack against a Small 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 axolotl, and it takes 5 (2d4) acid damage at the start of each of the axolotl's turns. The axolotl can have only one target swallowed at a time. If the axolotl dies, a swallowed creature is no longer restrained by it and can escape from the corpse using 5 feet of movement, exiting prone. Regenerate. If the axolotl loses a limb other than its head, it may regrow the limb over the course of 1d4+1 1d4+1 days.
Amphibious. The axolotl can breath air and water.