Sepia bathyalis is a species of cuttlefish native to the southwestern Indian Ocean, specifically northwestern and southwestern Madagascar. It lives at a depth of between 300 and 500 m.[3]
Sepia bathyalis grows to a mantle length of 80 mm.[3]
^ abReid, A., P. Jereb, & C.F.E. Roper 2005. Family Sepiidae. In: P. Jereb & C.F.E. Roper, eds. Cephalopods of the world. An annotated and illustrated catalogue of species known to date. Volume 1. Chambered nautiluses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae). FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 1. Rome, FAO. pp. 57–152.