Life Science Solutions
Pennaria Hydrozoa
Most species belonging to the class of aquatic creatures known as hydrozoans may exist in either a medusa or polyp state. Some, however, such as the hydra, only exist as polyps.
Most species belonging to the class of aquatic creatures known as hydrozoans may exist in either a medusa or polyp state. Some, however, such as the hydra, only exist as polyps.