Kingdom: Animalia

Phylum: Hemichordata

Class: Pterobranchia

Order: Cephalodiscida

Description

Cephalodiscida is one of two orders in the class Pterobranchia, which are small, worm-shaped animals. Members belong to the hemichordates.[1][2] Species in this order are sessile, living in clear water and secrete tubes on the ocean floor

Reference

http://www.bie.ala.org.au/species/NZOR-4-75824

http://www.species-identification.org/species.php?species_group=zsao&id=4023