Probable toxin probably only used for predation. Nematocytes (PubMed:23151943, PubMed:29424690). In late planulae, is only expressed in a handful of nematocytes in the lower pharynx (PubMed:29424690). Is absent from the tentacles and outer body wall (PubMed:29424690). Transcripts are weakly expressed in gastrulae, early and late planulae, metamorphosing planulae, and primary polyps. Belongs to the NEP3 family.