Polyp: Stolonal Clytia-like colonies. Reproduction: Medusae with umbrella up to 6 mm wide, more or less elliptical; with up to 20 radial and centripetal canals; up to 9 complete and 7 rudimentary urn-shaped manubria, each with four simple lips; gonads sometimes developed in the middle parts of one or more radial canals; 26 well developed marginal tentacles and 17 rudimentary ones; 34 marginal statocysts. Ecology and Distribution: Living embedded in sponges. Known from Western Mediterranean and Black Sea. Known in Bocas del Toro from San Cristobal.