Gymnolaemata
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Gymnolaemata are a class of Bryozoans. Gymnolaemata are sessile, mostly marine organisms and grow on the surfaces of rocks, kelp, and in some cases on animalsTemplate:Citation needed, like fish. Zooids are cylindrical or flattened. The lophophore is protruded by action of muscles pulling on the frontal wall. This order includes the majority of living bryozoan species.
Orders
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- Cheilostomata Busk, 1852
- Ctenostomatida Busk, 1852