Life Science Solutions
Obelia Medusa: Second Generation
The elegant medusa jellyfish, illustrated in the photomicrograph above, is one of two forms that the hydrozoan Obelia takes during its two-generation life cycle. The free-swimming medusae reproduce sexually, producing eggs and sperm that fertilize to become ciliated, free-swimming larvae (planulae). The planulae remain pelagic for a period of time, eventually attaching to a surface and developing into polyps.
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