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Polyps are usually sessil.One body opening to bringin waterPolyps can reproduce asexuallyThey will be genetically identical

Fast Facts - Nutrients moved through diffusion -Milestone:tissues -Include Jellyshish, Hydra, and sea anemone-They have stinging cells

Cnidarian

Stingers paralyze prey

Most are hermaphrodites

Ocelli-eyespots:detects light

Gastroderm-inner layer of cavity

Specialized sensory cellsNerve net-group of cells that trnansmit messages.external fertilizationNo specilized organs