Celleporina tubulosa

Celleporina tubulosa is an encrusting bryozoan that initially forms lobed sheets, composed of a single layer of autozooids. Colonies later develop into small rounded mounds, made up of multiple layers autozooids, forming irregular spreading growths which are 8 by 8 mm or larger. Autozooids are small and flask-shaped. They are 0.4-0.5 by 0.25-0.3 mm.

Celleporina tubulosa is a rare species that has been only been reliably reported on three occasions from the Scilly Isles and the Catalan coast

The species is able to colonise rocks from the very lower shore.