Starfish Ninja spotted in Golden Gate Park

A week or so ago, my wife and I took our son to the California Academy of Sciences in Golden Gate Park, where I was secretly doing research for this project. Underneath the rain forest is the aquarium where I snapped the below photos. They have a tank where you can reach in and "pet" the starfish and sea urchins. Little Joe didn't have any interest in reaching into the tank. When I took a look at what was just beneath the surface, I understood why.