Bake-kujira

Echolocation. The Bake-kujira can't use its blindsight while deafened.

Hold Breath. The Bake-kujira can hold its breath for 30 minutes

Keen Hearing. The Bake-kujira has advantage on Wisdom (Perception) checks that rely on hearing.

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 13 (4d6 + 8) piercing damage.

Fling. One Large or smaller object held or creature grappled by the Bake-kujira  is thrown up to 60 feet in a random direction and knocked prone. If a thrown target strikes a solid surface, the target takes 3 (1d6) bludgeoning damage for every 10 feet it was thrown. If the target is thrown at another creature, that creature must succeed on a DC 18 Dexterity saving throw or take the same damage and be knocked prone.

Dive. Once one Large or smaller object held or creature grappled by the Bake-kujira can choose to dive under water suffocating the grappled creature

Grapple.  Target must make a Strength saving throw 15 or be grappled. Directly after a bite, the Bake-kujira can close its mouth grappling one Large or smaller object or creature.

Blood Bane (Curse). Whenever the sufferer takes piercing or slashing damage, she also takes 1d3 points of bleed damage. Furthermore, the cursed individual is especially susceptible to poisons taking double damage on all poison attacks. Can be cured only with both remove curse and remove disease cast within 1 minute of each other.

Unlucky (Curse). Any creature that gets damaged from the Bake-kujira is affected by the unlucky curse. When affected by this curse, the affected must roll twice for every roll and take the worst roll. Last for 3 days