Hydrozoans

Hydrozoa

Hydrozoa (hydrozoans) is a class in the phylum Cnidaria, containing 1,178 described species.

Scientific classification

Orders

• Leptothecata527
• Anthoathecata430
• Siphonophorae124
• Limnomedusae34
• Trachymedusae33
• Narcomedusae29
• Actinulida1