Description:
Colonies of Scrupocellaria regularis are erect and branching, forming short pink tufts on various substrata.  Zooids are narrow in the proximal portion, wider distally. The opesia are ovoid in shape, and occupy approximately 2/3 of the frontal area. Individual zooids measure an average of 0.02 X 0.007 inches. The innermost proximal spine is specialized to act as a shield or scutum over the membranous frontal area. This single spine covers most of the opesia, is large and paddle-shaped with pointed edges. Polypides have obliquely truncate lophophores which average 0.02 inches in  diameter. The horseshoe-shaped lophophore surrounding the mouth bears 13 tentacles that are somewhat translucent, and pink in color. There are defensive avicularia on the outer sides of individual zooids at the same level as the opesia.

Habitat:
Typical habitats for bryozoans in the Indian River Lagoon include seagrasses, mangrove roots, drift algae, oyster reef, dock, pilings, breakwaters, and man-made debris.  In the IRL, S. regularis has been collected from the rhodophyte Solieria.

Range:
Scrupocellaria regularis occurs in the Western Atlantic from Cape Hatteras to the Caribbean. It has also been reported from the Gulf of California in the Pacific Ocean.  In the Indian River Lagoon, S. regularis has been documented from the grass flats around the Sebastian Inlet area. It has also been collected coastally near Sebastian Inlet, Ft. Pierce Breakwater, Walton Rocks, and Capron Shoals.