Sneak Attack: If you have advantage you deal 3 extra damage. Amphibious: You can breath air and water. Keen Smell: you have advantage on Wisdom (Perception) checks that rely on smell.
Tail Slam: Melee Weapon Attack: +5 to hit, reach 5ft, one target. Hit: 19 3d10+3 bludgeoning damage. Bite: (Cooldown 1) Melee Weapon Attack: +6 to hit, reach 5ft, one target. Hit 27 4d12+3 bludgeoning damage, and the target is pulled 10 ft with you.
Sneaky: You take the hide action.