12 (natural armor)
76 (8d12+24)
walk 40 ft.
4
If the hippopotamus moves at least 20 feet straight toward a creature and then hits it with a gore attack on the same turn, that target must succeed on a DC 12 Strength saving throw or be knocked prone. If the target is prone, the hippopotamus can make one stomp attack against it as a bonus action.
The hippopotamus can hold its breath for 30 minutes.
Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 19 (3d8 + 6) piercing damage.
Melee Weapon Attack: +8 to hit, reach 5 ft., one prone target. Hit: 22 (3d10 + 6) bludgeoning damage.