Echolocation. The cachalot whale can't use its blindsight while deafened.
Hold Breath. The cacahalot whale can hold its breath for 30 minutes.
Keen Hearing. The cacahalot whale has advantage on Wisdom (Perception) checks that rely on hearing.
Capsize. If the cachalot whale moves at least 30 feet straight toward a boat or ship and then hits it with a ram attack on the same turn, then the ship's captain must succeed on a DC 16 Wisdom (Vehicle) check or have the ship keel over upside down.
Multiattack. The cachalot whale can make two attacks, one with its ram and one with its tail.
Ram. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 21 (5d8 + 6) piercing damage.
Tail. Melee Weapon Attack: +10 to hit, reach 20 ft., one target. Hit: (4d10 + 6)
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