Semibalanus balanoides
（重定向自Rock barnacle）
![](/Images/godic/202502/07/Barnacles3340.jpg")
![S. balanoides feeding, Upernavik, Greenland](/Images/godic/202502/07/Semibalanus_balanoides_upernavik_2007-07-053340.jpg")
Semibalanus balanoides is a common and widespread boreo-arctic species of acorn barnacle. It is common on rocks and other substrates in the intertidal zone of north-western Europe and both coasts of North America.