Polyp: Colony stolonal, with creeping hydrorhiza. Hydrocaulustall, unbranched. Perisarcpresent, but not forming a pseudohydrotheca. Hydranth with one whorl of amphicoronatefiliform tentacles. Reproduction: Gonophores released as free medusae, medusa buds growing on hydrorhizaand/or hydrocaulus. Adult medusa with large apical projection, two opposite hollow tentacles, 4 simple oral lips, with or without ocelli, with marginal tentaculaeor warts. Ecology and Distribution: Circum–subtropical distribution. In Bocas del Toro collected in a plankton tow near thedocks of the Bocas del Toro Research Station - Smithsonian Tropical Research Institute at night. Similar taxa: Amphinema rugosum.