Octopus

Octopi are a breed of multi-tentacles cephalopods that live within the ocean.

Combat
Generally regular octopi are not dangerous unless provoked, and in this case, will usually try to escape. Many have evolved the ability to blend into their environment. They can not only change the color of their skin, but also use muscle action to change its texture to appear more like whatever they are blending against. If they are pursued by predators, octopi are capable of expelling a cloud of ink before swimming away. Some octopi are venomous, capable of producing a paralytic neurotoxin.

Ecology
They make their homes along the bottom of the sea, particularly within coral reefs. Octopi are quite intelligent as mollusks go and capable of complex tactics in their pursuit of food.

Varieties

 * Blue ring octopus : Inherently good creatures that dwell in the oceans of the Underdark, trying to avoid the more powerful races with which they share territory.
 * Giant octopus : Unlike regular octopi, they are aggressively territorial and can have tentacles up to 10 ft (3 m) long.
 * Octo-jelly : A blind, bell-shaped octopus with the ability to change colour.