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Corals are able to share nutrients with each other. They pass these nutrients back and forth through gastrovascular canals that are located in the coenosarc.
Most corals are sessile meaning they cannot move to obtain food. Instead they stick out tentacles to catch prey items such as zooplankton and other food particles. The prey is dependent on the size of the coral polyp. Then they use their tentacles to place the prey into their mouths. In other lessons, you will learn other ways that corals feed.
Nematocysts are stinging cells that help aid corals in feeding. When the cell is stimulated a barb shoots out of the capsule, unraveling the coil, and impaling or wrapping around the prey item. The barb contains toxins that subdue its victim.
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