While snorkeling in the Great Barrier Reef, we saw three giant clams. As long as they weren't aware of your presence, they were wide open with water moving freely through their 2 valves. However, when your shadow passed over them, they "clammed up" by pulling in their podia and closing. Very beautiful to watch.
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| Giant clam open and filtering water with 2 valves; fleshy fluorescent green |
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| Same clam, spooked by our shadow passing over it |
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| This clam is tan; valve openings are larger than my fist |
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| Mike rocking the snorkel fashion |
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| Time for a lunch break before an afternoon of more fun in the reef |
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| Marine biologist Suzie, giving lecture on fish facts |
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