Crocodoggle

 Hold Breath. The crocodoggle can hold its breath for 10 minutes

Keen Hearing and Smell. The crocodoggle has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Pack Tactics. The crocodoggle has advantage on attack rolls against a creature if at least one of the crocodoggle's allies is within 5 feet of the creature and the ally isn't incapacitated.

Multiattack. The crocodoggle makes two attacks: one with its bite and one with its tail.  

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (2d4 + 5) piercing damage. If the target is a creature, it must succeed on a DC 12 Strength saving throw or be grappled.

Tail. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (2d4 + 5) bludgeoning damage. If the target is a creature, it must succeed on a DC 12 Strength saving throw or be knocked prone.