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Barnacles

Barnacles are the strangest of crustaceans. Imagine a tiny shrimp glued down by the top of its head, with its antennae waving in the current, and you begin to understand what a barnacle really is.

Northern Rock Barnacles ( Balanus balanoides, to 1" ) grow in the intertidal zone, subtidal in places, attached to any hard surface. They are in constant competition for living space with mussels. Mussels grow faster but are more susceptible to drying out. Therefore, mussels quickly take over the lower wetter areas, while barnacles rule in the higher dryer reaches.

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