The rock-sock (Chiantithuria timorensis) is a burrowing sea-cucumber species adapted to root itself deep beneath muddy sand, and extend its feeding tentacles, mouth, and anus up to the surface at the end of long retractable 'neck'. This particular species was discovered living in the shallow waters off the western coast of Australia.

    There are some superficial resemblences between genus Chiantithuria and Arel holothuroidean species, but the form of the ossicles that support its leathery skin suggest it is more closely related to species that are known only from these ossicles, that in our world vanished with the passing of the Cretaceous.

(Text by Drhoz )