Crisia SEM of Crisia eburnea showing an enlarged gonozooid . Photo by J. Winston, courtesy of the American Museum of Natural History. Used with permission. Colonies of C. eburnea form fragile white tufts as they grow on the stems of algae.
Branches curve somewhat inward, and joints are yellowish in color.
Zooids are tubular and punctate, approximately 0.10 X 0.25 mm on average. The orifice comes to a point distally. C. eburnea occurs in the IRL in association with algae and seagrasses. Individual zooids measure 0.10 X 0.25 mm on average. Gonozooids in C. eburnea generally occur between the fourth and fifth zooid of a fertile internode.