Hydralike Animals (Hydrozoa) also commonly known as Hydroids or Hydrozoans, is a biological class of the kingdom Animalia and phylum Cnidaria.
Actinulida
Anthoathecatae
Limnomedusae
Narcomedusae
Siphonophorae
Leptothecatae
Trachymedusae
Anthozoa
Hydrozoa
Scyphozoa
Malacosporea
Myxosporea
Polypodiozoa
Cubozoa
Staurozoa