As the name suggests, this species of octopus has incredibly long arms in relation to its body length. The arms are commonly around 30cm in length whereas the body is only about 6cm. The Atlantic Longarm Octopus can grow to about 36 inches or 1 meter in length when the body and arm lengths are measured. The arms are normally more than 7 times the length of the body!
They are quite distinctive with their reddish brown colouring and small white spots however as with many other species they are able to change their color and texture as the need arises. They have eyes high up on the head with a distinctive bump above each one.