Hidden Cup Coral

About

Hidden Cup Coral (Phyllangia americana) is a small, solitary stony coral native to the reef systems and coastal waters of Belize and Mexico in the western Central Atlantic. Unlike the brightly lit upper reef zones that most corals call home, this species gravitates toward shaded areas, overhangs, cave ceilings, and dimly lit rocky surfaces, which explains how it earned its common name. In the wild it occupies a surprisingly broad depth range, turning up anywhere from the shallows down to well over 100 meters, which speaks to its adaptability to low-light conditions. Each polyp sits in a small, neat calcareous cup, giving the coral its characteristic cup-like appearance. In the aquarium, that preference for lower light is actually what makes it interesting to keep. It can be tucked into spots of the tank that go largely unused by other corals. Moderate flow suits it well, keeping detritus from settling on the polyps without blasting them. It falls into the intermediate care category, less because it is fragile and more because replicating its preferred shaded microhabitat takes a bit of thought. Reef safe and non-aggressive, it is a solid choice for hobbyists looking to populate the shadier corners of a mature system.