Bathypolypus arcticus, the North Atlantic octopus, deep sea octopus or spoonarm octopus is a small species of demersal octopus of the North Atlantic. It is usually found at depths of 200 to 600 m (660–1,970 ft) where the temperature is between 2 and 6 °C (36–43 °F).

Description Bathypolypus arcticus is a small, short-armed octopus which is between 6 and 10 cm (2.4–3.9 in) in length, with an average adult weight of around 45 g (1.6 oz) and a maximum of 300 g (11 oz). Like other deep-sea octopuses, Bathypolypus arcticus do not have ink sacs. The mantle is globular, being nearly as wide as it is long. The surface of mantle, head, arms and web is covered in warts, especially around the eyes. The arms are short and in an irregular order with two rows of small suckers.

Ecology Bathypolypus arcticus has low fecundity meaning that they lay fewer, relatively larger eggs than many other octopuses from which benthic young hatch. The female broods her eggs for over 400 days during which time it ceases to eat and slowly wastes away as it metabolises its own body to provide energy to guard the eggs and young. This was considered the longest brooding period for an octopus until surpassed by Graneledone boreopacifica.