Armor Class 12 (natural armor)
Hit Points 11 (2d8 + 2)
Speed swim 60 ft.
Skills Perception +3
Senses blindsight 60 ft., passive Perception 13
Languages —
Challenge 1/8
Charge. If the dolphin moves at least 30 feet straight toward a target and then hits it with a slam attack on the same turn, the target takes an extra 3 (1d6) bludgeoning damage.
Hold Breath. The dolphin can hold its breath for 20 minutes.
Slam. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) bludgeoning damage.
Volo's Guide to Monsters, p. 208