A porcelain crab sits atop a sea pen. "I took this image right in front of the very first house my family and I rented in the Philippines," says Savin. "I know every rock underwater there. Plenty of sea pens can be found anywhere from five to 17 meters here. If you go a little deeper you will come across large sea pens that live on the desert-like sandy bottom. They like the current as it brings a lot of food. You can often see the sea pen's constant companion, the porcelain crab, also feeding here."