Giant Octopus

Large beast · CR 1

Armor Class 11

Hit Points 52 (8d10+8)

Speed swim 60 ft., 10 ft.

STR 17 +3

DEX 13 +1

CON 13 +1

INT 4 -3

WIS 10 +0

CHA 4 -3

Skills perception +4, stealth +5

Senses darkvision60 ft. , passive Perception 14

Traits

Hold Breath.: While out of water, the octopus can hold its breath for 1 hour.
Underwater Camouflage.: The octopus has advantage on Dexterity (Stealth) checks made while underwater.
Water Breathing.: The octopus can breathe only underwater.

Tentacles. Melee/Ranged Weapon Attack: +5 to hit.: Melee Weapon Attack: +5 to hit, reach 15 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage. If the target is a creature, it is grappled (escape DC 16). Until this grapple ends, the target is restrained, and the octopus can't use its tentacles on another target.
Ink Cloud (Recharges after a Short or Long Rest).: A 20-foot-radius cloud of ink extends all around the octopus 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 octopus can use the Dash action as a bonus action.