Editing Barnacle (section)

=== Biofouling ===

{{main|Biofouling}}

Barnacles are of economic consequence, as they often attach themselves to man-made structures. Particularly in the case of ships, they are classified as [[Biofouling|fouling]] organisms. The number and size of barnacles that cover ships can impair their efficiency by causing [[hydrodynamics|hydrodynamic]] [[Drag (physics)|drag]].<ref name="Holm 2012">{{cite journal |last=Holm |first=E. R. |title=Barnacles and Biofouling |journal=[[Integrative and Comparative Biology]] |volume=52 |issue=3 |date=2012-09-01 |doi=10.1093/icb/ics042 |pages=348–355 |pmid=22508866 }}</ref>

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File:Havstulpan.jpg|Barnacles on a boat [[propeller]]
File:Barnacles on a Ship.jpg|Barnacles on a ship. The resulting [[biofouling]] creates drag, slowing the ship and reducing its fuel efficiency.<ref name="Holm 2012"/>
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