Compression. The octopus can move through a space as narrow as 1 inch without expending extra movement to do so.

Water Breathing. The cuddlefish can breathe only underwater.

Chromatic Bioluminescence. The cuddlefish can alter the color, intensity, and pattern of its bioluminescent markings at will.

As a bonus action, the cuddlefish can cause its body to emit dim light in a 10-foot radius, choosing the color and pattern of the light (such as gentle pulses, rippling waves, or brief flashes). The light can be changed or extinguished at will.

Static Pulse

Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 30 ft., one creature.
Hit: 7 (2d6) lightning damage, and the target must succeed on a DC 13 Constitution saving throw or have its speed reduced by 10 feet until the start of its next turn.

Abyssal Stillness

(Recharge 5–6)

As a bonus action, the cuddlefish emits a field of stabilizing pressure and soft bioluminescent light in a 30-foot radius centered on itself. The field lasts for 1 minute or until the cuddlefish is incapacitated.

At the start of each of the cuddlefish’s turns, each allied creature of its choice in the area gains 8 temporary hit points, and the frightened condition ends on that creature.

While in the area, allied creatures can’t be frightened.

This effect ends immediately if the cuddlefish is stunned, paralyzed, or unconscious.

Ink Veil (1/Day)

When the cuddlefish takes damage, it can release a cloud of shimmering ink. The cuddlefish becomes invisible until the start of its next turn, or until it makes an attack.