The Dungeness crab, Metacarcinus magister, is native to eelgrass beds off the coast of Western North America. It eyes are set atop stalks that can retract to shield its photoreceptors. Like all true crabs, this species is technically a decapod with ten appendages, the last set of two modified to serve as claws. This fellow and I had a long stare down before he finally raised both eyes up and I snapped his portrait at San Francisco’s Aquarium of the Bay. You can see more marine photography and learn about how the world’s coral reefs are changing and adapting in vedphoto’s upcoming Reactive Reefs exhibition at www.vedphoto.com/reactive-reefs