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Fieldtrip to 15th St. Public Dock, Newport Harbor, and Reef Point, Crystal Cove S.P., Orange Co., CA, March 29, 2013

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sponges and tunicates
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Native oysters, Ostrea lurida, were common on this dock.
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There were lots of both solitary and compound tunicates.
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encrusting bryozoan
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drift Eisenia arborea (southern sea palm)
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A California sea lion did not seem to be bothered by people. He looked rather thin.
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shell of Norris' top snail (Norrisia norrisi)
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Brachedontes sp. (I am working on this small ribbed mussel, which does not seem to be the same as the Panamic B. adamsianus.)
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Nucella emarginata (emarginate dogwinkle)
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I normally only see this bryozoan encrusting shells that already have hermit crabs in them. On those, the bryozoan layers get much thicker. This snail is definitely already infected. I don't know which bryozoan this is and I would like to know.
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This is what subtidal hermit crab shells of Pterapurpura spp. often look like, thanks to the growth of whatever this bryozoan might be on their acquired shell.
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The bottom side of a pholad, a bivalve that bores into sedimentary rocks.
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a boring pholad
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The tiny Keep's chiton (Cyanoplax keepiana) is always difficult to get in sharp focus. I didn't do very well.
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aggregating anemones surrounding a limpet grazing patch

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