Arachnidium (bryozoan)

Arachnidium are a genus of colonial ctenostome bryozoans. They lack a calcified cuticle and form dense encrusting colonies on barnacles or other shelled organisms. Individual zooids are roughly 150 microns in size, have a lophophore with about 13 tentacles, and have about 10 to 11 connections to other zooids in the colony.^[1]

Arachnidium
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Bryozoa
Class:	Gymnolaemata
Order:	Ctenostomatida
Family:	Arachnidiidae
Genus:	Arachnidium
Species
A. fibrosum Hincks, 1880[1]