 Such epibionts include other bryozoa such as "Crista eburnea", hydroids, sessile polychaete worms and the porcelain crab "Pisidia longicornis".Other animals feed on "F. foliacea", including the sea urchins "Echinus esculentus" and "Psammechinus miliaris" and the nudibranch "Crimora papillata"; the pycnogonid "Achelia echinata" feeds preferentially on "F.