tide pool with purple urchins and a large sea anemone with reflections

coastal ecosystem algaecovered rocks aquatic flora california fort bragg infestation intertidal zone marine biodiversity invertebrates north coast ocean life organisms pacifc predatory anemones radial symmetry rocky shore saltwater habitat sea urchins seawater pools spiny starburst urchin tentacles tidal fluctuations tidepool tide pool purple uchins large anemone northern lots shallow water underwater reflections