Description

 A small worm-like sea cucumber, 2 -4 cm in length, lacking tube feet or respiratory trees. The body wall is transparent but bears small brown glandular papillae. Five prominent opaque bands (the longitudinal muscles) are visible through the transparent body wall. The mouth is surrounded by 12 tentacles, of similar size, each bearing four digits. Gonads consist of two simple branched tubules in the coelum.Labidoplax media may be synonymous with Labidoplax buskii (Ostergren, 1905) (Howson & Picton, 1999). Gotto & Gotto (1972) stated that Labidoplax media can be distinguished from Labidoplax buskii by the presence of 12 tentacles (rather than 11), four tentacular digits (rather than 5) and the branched gonadial tubules. A full description of Labidoplax media is provided by Gotto & Gotto (1972) and keys to synaptids by Clark (1907) and Mortensen (1927).