Known from northern Japan (Akkeshi Bay, Hokkaido) and southern Kuril Islands.
Shikotan Island, South Kuril Islands, Russia, NW Pacific. Depth: 2-3 m. Length: 3-4 mm. 17 July, 2005. on red algae. Photographer: A.V.Chernyshev
Stiliger akkeshiensis was described from Akkeshi Bay, Hokkaido, on the basis of a 6 preserved specimens, about 4mm long preserved. All we know about its colour is the sentence "preserved specimens have traces of blackish mottles and streaks on the head, rhinophores, back, tail and sides.."
Baba considered this species to belong the subgenus Ercolania.
Baba, K. (1935) The fauna of Akkeshi Bay. 1. Opisthobranchia. Journal Faculty Science, Hokkaido Imperial University, series 6, Zoology 4: 115-125. (Pls.7-8)
Baba, K. (1959) The family Stiligeridae from Japan (Opisthobranchia- Sacoglossa). Publications of the Seto Marine Biological Laboratory, 7: 327-334.
Rudman, W.B., 2005 (September 8) Stiliger akkeshiensis Baba, 1935. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/stilakke