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Monster · SRD 5.1

Giant Octopus

Large beast, unaligned

Armor Class
11
Hit Points
52 (8d10)
Speed
swim 60 ft., 10 ft.
STR
17 (+3)
DEX
13 (+1)
CON
13 (+1)
INT
4 (-3)
WIS
10 (+0)
CHA
4 (-3)
Senses
darkvision 60 ft., passive perception 14
Challenge
1 (200 XP)

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.

Actions

Tentacles. 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. 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.

Large beast, unaligned

Special Abilities

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.

Actions

Tentacles

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

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.

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This work includes material taken from the System Reference Document 5.1 (“SRD 5.1”) by Wizards of the Coast LLC and available at https://dnd.wizards.com/resources/systems-reference-document. The SRD 5.1 is licensed under the Creative Commons Attribution 4.0 International License available at https://creativecommons.org/licenses/by/4.0/legalcode.

Reformatted and reorganized for presentation on PostRoll; text unmodified.

Licensed under Creative Commons Attribution 4.0 International.

srd-5.1 · Version 1.0.0 · Updated Jul 9, 2026