Pollicipes, Magical in the Morning

Sunlight penetrates the mouth of an intertidal cave, illuminating the goose-neck barnacles within. The morning rays particularly light up hemoglobin in the barnacle’s blood. Lamb and Hanby (2005) make quite a deal about the glorious red blood of Nakwakto goose-necks from Slingsby Channel, British Columbia, Canada. The striking blood of Nakwaktos is visible, supposedly, because…

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Recruitment in Barnacles Looks Like This

Last fall this vertical rock wall lay buried under a smothering layer of sand. The resident barnacles, Balanus glandula, couldn’t tolerate it. Winter surf removed the sand revealing empty B. glandula shells and something more; a dense settlement of new recruits. Open space doesn’t stay open long in the in the exposed rocky intertidal. Larvae arrive in…

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Barnacles On Top of Barnacles

There are a lot of impacts in the exposed surf zone and barnacles are always breaking away from their rocky homes and washing up on the sandy beaches.  These thatched barnacles, Semibalanus cariosus, the ones piled one upon the other, are among the most common barnacle finds on TOS beaches.  They can get pretty densely…

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