Probable neuropeptide. Is expressed in the ectodermal cells of gastrulae and planulae. Is also noticeable in the endoderm in late planulae. In the primary polyps, is expressed in both ectoderm (sensory neurons) and endoderm (ganglions). Is not expressed in nematocytes. Is strongly and equally detected in planulae, in primary polyps (9d), and in both adult females and males (at protein level) (PubMed:33060291). Transcripts are expressed early in development in ectodermal cells of the gastrula, then increases in early planula and by the late planula spreads in expression to endodermal cells. In primary polyps, they are expressed in ectodermal sensory cells and multiple endodermal ganglion cells that send their processes in different directions all around the body (PubMed:33060291). Extended N-terminus.