Tubularian

n. (Zool.) Any hydroid belonging to the suborder Tubularida. [ 1913 Webster ]

☞ These hydroids usually form tufts of delicate tubes, and both gonophores and hydranths are naked. The gonophores of many of the species become free jellyfishes; those of other species remain permanently attached as medusoid buds or sporosacs. See Illust. under Gonosome, and Cymnoblastea. [ 1913 Webster ]