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.
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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.
对不起，此内容在您的国家不适用。