Mantle narrowly-conical, narrower than head, long, pointed behind. Fins in larvae and juveniles narrow and long, beginning in anterior third of mantle, widening behind; in adults like narrow strip along most of the mantle, not joined posteriorly. Arms short, particularly in juveniles, with 2 rows of rather large suckers, not transformed into hooks. Tentacles short and thin in juveniles, long in adults, very small suckers in many rows occupying most of widened club, abruptly changing into 4 rows of large suckers only in distal part, of which the central ones are not larger than the marginal. No fixing apparatus. ML up to 17 cm.