Ragionula rosacea is a cheilostome bryozoan in the family Romancheinidae, and is one of only two species in the genus Ragionula. The species forms erect and three-dimensional colonies on hard substrates such as rocks and shells. The primary orifice is bell-shaped and gets progressively covered by the formation of a peristome as the colony ages. You always have one suboral avicularium, and occasionally there may be two. Otherwise, there may be sporadic avicularia at random locations on the surface of the colony. The ovicells are only visible when they are recently developed, and are quickly “engulfed” by the peristome.
Ragionula rosacea is a northern species, but is found along the entire Norwegian coast. It has been found in relatively shallow water (12 meters) and down to 300 meters.