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Balanus glandula/Chthalamus sp.
Balanus: white to gray, to 22 mm diameter; 6 unequal-size shell plates, ribbed to smooth depending on location; with calcareous basal plate. Chthalamus: small, brownish white to gray; to 8 mm diameter, 6 ~equal size shell plates, smoother than Balanus glandula; lacks calcareous basal plate. I think there is a mix fo both species in my pictures so I place both species names in this spotting. The last pic could be mostly of Chthalamus.
Very abundant, high to mid-intertidal zones, exposed outer coast to protected bays. Seen in tidal pools next to Morro Rock, Morro Bay, CA.
Spotted on Sep 23, 2014
Submitted on Jan 30, 2015
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