13 (natural armor)
27 (5d8+5)
walk 10 ft., swim 40 ft.
Acrobatics +4, Athletics +3, Stealth +4
darkvision 60 ft.
Aquan
1
The grindylow can mimic humanoid voices. A creature that hears the sounds can tell they are imitations with a successful DC 13 Wisdom (Insight) check.
The grindylow has advantage on ability checks and saving throws made to escape a grapple.
The grindylow can breathe only underwater.
The grindylow makes two attacks. one with its bite and one with its claws.
Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) piercing damage.
Melee Weapon Attack: +3 to hit, reach 10 ft., one target. Hit: 8 (2d6 + 1) slashing damage and the target is grappled (escape DC 13). Until this grapple ends, the target is restrained, and the grindylow can't use its claws on another target.
A 20-foot-radius cloud of ink extends all around the grindylow if it is underwater. The area is heavily obscured for 1 minute, although a significant current can disperse the ink. After releasing the ink, the grindylow can use the Dash action as a bonus action.