The abyssal spiderfish, Bathypterois longipes, is a species of deepsea tripod fish, a demersal fish living on the bottom of the Atlantic Ocean, even on the abyssal plain. It is one of the deepest-dwelling fish known.

This solitary fish grows about ten inches long, and has a "tripod" formation of fins both used to rest on the bottom, and to travel on the water column. It lives in extremely cold water, at temperatures of 32–48 °F (0–9 °C).