Summary description from Wikipedia:

Semibalanus balanoides in languages:

Bokmål

fjærerur

Danish

Lavvandsrur

Dutch

Gewone zeepok

English

Northern Rock Barnacle

English

Northern Acorn Barnacle

French

balane commune

German

Gemeine Seepocke

Russian

Обыкновенный морской желудь

Swedish

Räfflad havstulpan

Images from inaturalist.org observations:

We recommend you sign up for this excellent, free service.

©Jade Kirkpatrick, some rights reserved (CC-BY-NC)

©Jonah Levy, some rights reserved (CC-BY-NC)

©Sylvain Le Bris, some rights reserved (CC-BY-NC)

©oscarnigam, some rights reserved (CC-BY-NC)

©Ian Manning, some rights reserved (CC-BY)

©nychr9952, some rights reserved (CC-BY-NC)

©nychr9952, some rights reserved (CC-BY-NC)

©nychr9952, some rights reserved (CC-BY-NC)

©stephen, some rights reserved (CC-BY)

©Michelle Martin, some rights reserved (CC-BY-NC)

©Bethany Harrison, some rights reserved (CC-BY)

©Stephen James McWilliam, some rights reserved (CC0)

©Stephen James McWilliam, some rights reserved (CC0)

©Stephen James McWilliam, some rights reserved (CC0)

©wanderingeden, some rights reserved (CC-BY-NC)

©Sybil Nunn, some rights reserved (CC-BY-NC)

©RobSid, some rights reserved (CC-BY-NC)

©dbilton, some rights reserved (CC-BY-NC)

©dbilton, some rights reserved (CC-BY-NC)

©dbilton, some rights reserved (CC-BY-NC)

©Cam Fox, some rights reserved (CC-BY)

©Marissa Balfour, some rights reserved (CC-BY-NC)

©Sean Hartnett, some rights reserved (CC-BY-NC)

©Aarati, some rights reserved (CC-BY-NC)

©Aarati, some rights reserved (CC-BY-NC)

©gwt2102, some rights reserved (CC-BY-NC)

©gwt2102, some rights reserved (CC-BY-NC)

©Daisy Johnston, some rights reserved (CC-BY-NC)

©Lee Thomas, some rights reserved (CC-BY-NC)

©Lee Thomas, some rights reserved (CC-BY-NC)

©Lee Thomas, some rights reserved (CC-BY-NC)

©Lys, some rights reserved (CC-BY-NC)

©cozzzzz, some rights reserved (CC-BY-NC)

©cav91, some rights reserved (CC-BY-NC)

©cav91, some rights reserved (CC-BY-NC)

©Alexis, some rights reserved (CC-BY)

©Donald Hampton, some rights reserved (CC-BY-SA)

©Donald Hampton, some rights reserved (CC-BY-SA)

©cdillingham, some rights reserved (CC-BY-NC)

©Attila Oláh, some rights reserved (CC-BY)

©Attila Oláh, some rights reserved (CC-BY)

©Attila Oláh, some rights reserved (CC-BY)

©swimjamie, some rights reserved (CC-BY-NC)

©swimjamie, some rights reserved (CC-BY-NC)

©Stephen James McWilliam, some rights reserved (CC0)

©Stephen James McWilliam, some rights reserved (CC0)

©Bean chan, some rights reserved (CC-BY-NC)

©tidbit98, some rights reserved (CC-BY-NC)

©jerame1412, some rights reserved (CC-BY-NC)

©bgaudubon, some rights reserved (CC-BY-NC)

©bgaudubon, some rights reserved (CC-BY-NC)

©bgaudubon, some rights reserved (CC-BY-NC)

©bgaudubon, some rights reserved (CC-BY-NC)

©bgaudubon, some rights reserved (CC-BY-NC)

©anthropos, some rights reserved (CC-BY-NC)

©anthropos, some rights reserved (CC-BY-NC)

©lkotewicz, some rights reserved (CC-BY-NC)

©oscarnigam, some rights reserved (CC-BY-NC)

©oscarnigam, some rights reserved (CC-BY-NC)

©rhodriatpeak, some rights reserved (CC-BY-NC)

©Andy Goerdel - Texas Master Naturalist, Good Water Chapter, some rights reserved (CC-BY-NC)

©Alexis, some rights reserved (CC-BY)

©Candice, some rights reserved (CC-BY-NC)

©Denis Gallant, some rights reserved (CC-BY-NC)

©Denis Gallant, some rights reserved (CC-BY-NC)

©Denis Gallant, some rights reserved (CC-BY-NC)

©Maria Kovalenko, some rights reserved (CC-BY-NC)

©Maria Kovalenko, some rights reserved (CC-BY-NC)

©robinsonj99, some rights reserved (CC-BY-NC)

©robinsonj99, some rights reserved (CC-BY-NC)

©robinsonj99, some rights reserved (CC-BY-NC)

©nudbuda, some rights reserved (CC-BY-NC)

©Claire Alarcon-Belanger, some rights reserved (CC-BY-NC)

©toldig, some rights reserved (CC-BY-NC)

©Augustin Soulard, some rights reserved (CC-BY)

©Sarah Lou H, some rights reserved (CC-BY-NC)

©bend2000, some rights reserved (CC-BY-NC)

©Ben, some rights reserved (CC-BY-NC)

©snakebird15, some rights reserved (CC-BY-NC)

©Jon Mortin, some rights reserved (CC-BY)

©Martin Kalfatovic, some rights reserved (CC-BY-NC)

©emily_bianco03, some rights reserved (CC-BY-NC)

©ripleem, some rights reserved (CC-BY-NC)

©whyissummerhot, some rights reserved (CC-BY-NC)

©oscarnigam, some rights reserved (CC-BY-NC)

©Peter Stimmler, some rights reserved (CC-BY-NC)

©sd745, some rights reserved (CC-BY-NC)

©hazelsnail, some rights reserved (CC-BY-NC)

©brendanboyd, some rights reserved (CC-BY)

©Attila Oláh, some rights reserved (CC-BY)

©anaekstrom, some rights reserved (CC-BY-NC)

©ella_b_k, some rights reserved (CC-BY-NC)

©greenari, some rights reserved (CC-BY-NC)

©greenari, some rights reserved (CC-BY-NC)

©dleduc, some rights reserved (CC-BY-NC)

©Daniel Petersen, some rights reserved (CC-BY-NC)

©Pierre Corbrion, some rights reserved (CC-BY-NC-SA)

©Pierre Corbrion, some rights reserved (CC-BY-NC-SA)

©Pierre Corbrion, some rights reserved (CC-BY-NC-SA)

©Andrew Allen, some rights reserved (CC-BY)

©Lorri Gong, some rights reserved (CC-BY-NC-ND)

©Lorri Gong, some rights reserved (CC-BY-NC-ND)

©stephen, some rights reserved (CC-BY)

©stephen, some rights reserved (CC-BY)

©cassidiep, some rights reserved (CC-BY-NC)

©Lorri Gong, some rights reserved (CC-BY-NC-ND)

©Lorri Gong, some rights reserved (CC-BY-NC-ND)

©mikeflanny, some rights reserved (CC-BY-NC)

©mikeflanny, some rights reserved (CC-BY-NC)

©ameliamhadfield, some rights reserved (CC-BY-NC)

©Татьяна Максимова, some rights reserved (CC-BY)

©Татьяна Максимова, some rights reserved (CC-BY)

©anne-matthew, some rights reserved (CC-BY-NC)

©marmalade2311, some rights reserved (CC-BY-NC)

©marmalade2311, some rights reserved (CC-BY-NC)

©Никифорова Валерия, some rights reserved (CC-BY-NC)

©Lauren Markewicz, some rights reserved (CC-BY)

©Eva Ullström, some rights reserved (CC-BY-NC)

©Bethany Harrison, some rights reserved (CC-BY)

©emilymj6, some rights reserved (CC-BY-NC)

©gwt2102, some rights reserved (CC-BY-NC)

©gwt2102, some rights reserved (CC-BY-NC)

©gwt2102, some rights reserved (CC-BY-NC)

©gwt2102, some rights reserved (CC-BY-NC)

©alfiedavis, some rights reserved (CC-BY-NC)

©reganadametz, some rights reserved (CC-BY-NC)

©kevinsma11, some rights reserved (CC-BY-NC)

©kevinsma11, some rights reserved (CC-BY-NC)

©Sherry Kirkvold, some rights reserved (CC-BY-NC)

©marijune_lina, some rights reserved (CC-BY-NC)

©Nick Kleinschmidt, some rights reserved (CC-BY)

©Nick Kleinschmidt, some rights reserved (CC-BY)

©Nick Kleinschmidt, some rights reserved (CC-BY)

©Nick Kleinschmidt, some rights reserved (CC-BY)

©Nick Kleinschmidt, some rights reserved (CC-BY)

©Nick Kleinschmidt, some rights reserved (CC-BY)

©Sequoia Janirella Wrens, some rights reserved (CC-BY-NC)

©getcreative, some rights reserved (CC-BY-NC)

©Karsten Mody, some rights reserved (CC-BY-NC)

©Louis-Philippe Bateman, some rights reserved (CC-BY-NC)

©Louis-Philippe Bateman, some rights reserved (CC-BY-NC)

©Stephen James McWilliam, some rights reserved (CC0)

©Robert W. Harding, some rights reserved (CC-BY-NC)

©Jonah Levy, some rights reserved (CC-BY-NC)

©Rachel Stringham, some rights reserved (CC-BY)

©Stephen James McWilliam, some rights reserved (CC0)

©Stephen James McWilliam, some rights reserved (CC0)

©Nick Kleinschmidt, some rights reserved (CC-BY)

©Nick Kleinschmidt, some rights reserved (CC-BY)

©jessiemcfadden, some rights reserved (CC-BY-NC)

©Sequoia Janirella Wrens, some rights reserved (CC-BY-NC)

©Sequoia Janirella Wrens, some rights reserved (CC-BY-NC)

©Jacques Ranger, some rights reserved (CC-BY-NC)

©Sybil Nunn, some rights reserved (CC-BY-NC)

©Corey Farwell, some rights reserved (CC-BY)

©bridgid205, some rights reserved (CC-BY-NC)

©Susan Marley, some rights reserved (CC-BY)

©jessiemcfadden, some rights reserved (CC-BY-NC)

©bdagley, some rights reserved (CC-BY)

©Fiona Boston, some rights reserved (CC-BY)

Parent Taxon

• Semibalanus

Sibling Taxa

• Semibalanus balanoides
• Semibalanus cariosus

Top Observation Places

• East Hampton
• Victoria
• Saint-Malo
• Bangor
• Brooklyn
• Queens
• Jamaica
• East Flatbush
• East New York
• Astoria
• Borough Park
• Sunset Park
• Sheepshead Bay
• Elmhurst
• Bushwick
• Gravesend
• Corona
• Richmond Hill
• Flatbush
• Chinatown
• Canarsie
• South Ozone Park
• Brownsville
• Ridgewood
• Forest Hills
• Jackson Heights
• Bayside
• Park Slope
• Flatlands
• Bensonhurst
• Coney Island
• Cypress Hills
• Ozone Park
• Briarwood
• Queens Village
• Portland
• Halifax
• Dartmouth
• Boston
• South Boston
• Quincy
• Lynn
• Weymouth
• Revere
• Peabody
• South Peabody