the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [noun] > class Acalepha > member of (jelly-fish) > parts of > prolongation from mouth for catching prey (1)
mouth arm1884
any of several elongated, usually frilled lobes surrounding the mouth in certain jellyfishes and involved in the capture and ingestion of prey.