Editing Barnacle (section)

=== Filter feeding ===

Most barnacles are filter feeders. From within their shell, they repeatedly reach into the water column with their cirri. These feathery appendages beat rhythmically to draw [[plankton]] and detritus into the shell for consumption.<ref name=Doyle1997/><ref>{{cite book |last1=Riisgård |first1=Hans Ulrik |editor1=Thiel, Martin |editor2=Watling, Les |chapter=Filter-feeding mechanisms in crustaceans |title=Life styles and feeding biology. The natural history of the Crustacea |volume=2 |year=2015 |publisher=Oxford University Press |url=https://www.researchgate.net/publication/289520648 |pages=418–463}}</ref>

<gallery class="center" mode="nolines" widths="235" heights="200">
File:Giant Acorn Barnacle, Embarcadero, Morro Bay, CA, US imported from iNaturalist photo 149595197.jpg|''[[Balanus nubilus]]'' with cirri extended
File:Entenmuscheln.jpg|[[Goose barnacle]]s, with their cirri extended for feeding
File:Scalpellid barnacle feeding.jpg|A [[Scalpellidae|scalpellid]] barnacle feeding
File:Semibalanus balanoides upernavik 2007-07-05.ogv|''[[Semibalanus balanoides]]'' filter-feeding by projecting and retracting their cirri 
</gallery>