Akhlut

Echolocation. The akhlut can't use its blindsight while deafened.

Hold Breath. The akhlut can hold its breath for 30 minutes.

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

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

Multiattack. The akhlut makes two attacks: one with its bite and one with its tail slam. It can't make both attacks against the same target.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 18 (4d6 + 4) piercing damage.

Tail Slam. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 22 (4d8 +4) bludgeoning damage.