How do poriferan animals differ from coelenterate animals?

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Porifera Coelenterata
They are mostly marine, non-motile, and found attached to rocks. They are aquatic, mostly marine, and can be sessile or free-swimming.
They exhibit a cellular level of organization. They exhibit a tissue level of organization.
The body has pores (ostia) and a central cavity called spongocoel. The body has a central gastrovascular cavity with a single opening called the hypostome.
Examples: $Spongilla$, $Euplectella$, $Sycon$. Examples: $Hydra$, $Sea \text{ } anemone$, $Corals$.

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