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== Anatomy == | == Anatomy == | ||
'''The outermost layer of a barnacle is its shell. The shell of the adult barnacle is usually composed of four to eight Calcereous plates which form a shape that resembles a triangle with a hole at the top.[http://www.mesa.edu.au/friends/seashores/barnacles.html] This hole is also covered by two calcereous plates which can pull back to reveal six thoracic legs.[http://museumvictoria.com.au/crust/barnbiol.html]''' | |||
These legs are used for filter feeding in class cirripedia. The legs are extended into the water by the barnacle in order to catch whatever food it can.[http://www.cb1.com/~john/research/barnacle.html | |||
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