Cerberilla asamusiensis is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Aeolidiidae.

It was redescribed in more detail on the basis of more specimens from Sagami Bay and Tomioka, Amakusa District, Kumamoto.

[3] A very similar looking animal has been reported from Moreton Island, Queensland, Australia.

[4] All Cerberilla species have a broad foot and the cerata are long and numerous, arranged in transverse rows across the body.

In this species the back of the body and cerata bases are covered with diffuse brown pigment and the foot is translucent white.