Actinostola callosa is a species of sea anemones in the family Actinostolidae in the order Actiniaria.

It is a deep sea species and occurs in both Pacific and Atlantic Oceans from the continental shelf to abyssal depths.

[4] It occurs from the continental shelf to abyssal depths, generally in the range 84 to 2,915 m (280 to 9,560 ft).

[8] A. callosa contains about 30% lipids which are in the form of unsaturated fats and long-chain fatty acids.

The difference is likely due to the cold-water anemone needing membrane fluidity and a readily available source of energy that is quick to mobilise at low temperatures.