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Rock barnacles excrete waste through a process called defecation, which occurs after they filter feed. Their feeding process involves filtering plankton and organic particles from the water using their specialized appendages. Once the food particles are digested, the waste is expelled through their anus, which is located near the base of their shell. This waste typically takes the form of small pellets or strings, depending on the barnacle's diet and feeding habits.

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3mo ago

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