All photographs copyright (2003-2013) by Kris H. Light

<strong>Acorn Barnacles</strong> (<em>Semibalanus balanoides</em>) are arthropods that attach themselves to rocks, shells, pilings, and even whales and sea turtles. When they are submersed, they reach out for zooplankton with tiny arms.
Acorn Barnacles (Semibalanus balanoides) are arthropods that attach themselves to rocks, shells, pilings, and even whales and sea turtles. When they are submersed, they reach out for zooplankton with tiny arms.

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