What are the structural differences between obelia and jellyfish
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Obelia is a form of hydrozoans that have branched stalks. Also, the dominant phase of the life cycle of Obelia is the polyp. However, the polyp form of Obelia is very small. On the other hand, a jellyfish is a form of cnidarians whose dominant phase of the life cycle is a medusa, which is comparatively large.
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