Perception +4, Stealth +5
+1
Darkvision 60 ft
Traits
Water Breathing
The giant octopus can breathe only underwater.
Underwater Camouflage
The giant octopus has advantage on Dexterity (Stealth) checks made while underwater.
Hold Breath
While out of water, the giant octopus can hold its breath for 1 hour.
Actions
Tentacles
Melee Weapon Attack: +5 to hit, reach 5 ft.. Hit: 10 (2d6 + 3) bludgeoning damage.
The target is grappled (escape DC 16). Until this grapple ends, the target is restrained, and the giant octopus can't use its tentacles on another target.
Ink Cloud
1 use per short rest. A 20-foot-radius radius cloud of ink extends all around the giant 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 giant octopus can use the Dash action as a bonus action.