Keen Hearing: The Whale Wolf has advantage on Wisdom (Perception) checks that rely on hearing.
Silent Predator: The Whale Wolf has advantage on Dexterity (Stealth) checks.
Bloodlust: If the Whale Wolf downs a creature it regains 2d8 hit points, can move up to half its speed without provoking oppertunity attacks and makes one Bite attack at a target in range.
Pack Tactics: The Whale Wolf has advantage on an Attack roll against a creature if at least one of the Whale Wolf's allies is within 5 ft. of the creature and the ally isn't Incapacitated.
Multi Attack: The Whale Wolf makes a Claw, Bite and Tail attack.
Claw: Melee Weapon Attack +6
Hit: 18 (3d8+3) Slashing damage.
Bite: Melee Weapon Attack +6
Hit: 23 (4d8+3) Piercing damage.
Tail: Melee Weapon Attack +6, reach 10ft
Hit: 13 (2d8+3) Bludgeoning damage.