Cactus Coral

About

Cactus coral (Pavona giannii) is one of those genuinely approachable stony corals that doesn't demand much and rewards you with a lot of personality in return. Native to the East and West Pacific as well as waters off North Africa, it grows in that distinctive folded, wavy sheet form that earns it the alternate nicknames lettuce coral and potato chip coral. The comparisons are pretty apt once you see one in person. The fronds have a satisfyingly textured surface, and colonies can develop into quite complex, layered structures over time. In the wild it occupies a range of reef environments, often in spots where light doesn't always penetrate strongly and currents stay relatively gentle, which translates well to aquarium keeping. It does well under modest lighting and low flow, which means you can tuck it into areas of your tank that might otherwise be hard to stock. For a large-polyp stony coral it's considered quite forgiving, making it a reasonable choice if you're moving from soft corals into the SPS world for the first time. It's not the flashiest coral on the block, but its unusual sculptural form gives a reef tank a natural, organic look that's genuinely hard to replicate with other species.