5/8/09
Post date: Jun 3, 2009 8:56:10 PM
We saw the living sand dollars below at the Monterey Bay Aquarium. They are covered in purple spines. During storms, sand dollars swallow sand to weigh themselves down on the sea floor.
Post date: Jun 3, 2009 8:56:10 PM
We saw the living sand dollars below at the Monterey Bay Aquarium. They are covered in purple spines. During storms, sand dollars swallow sand to weigh themselves down on the sea floor.