Common name: lettuce coral

General information

The Pavona cactus, commonly known as Cactus Coral, Lettuce Coral, or Potato Chip Coral, is a species of small polyp stony (SPS) coral. It is known for its distinctive plating growth form that resembles the undulating leaves of a cactus or lettuce, giving it its common names. This coral exhibits a variety of colors, ranging from green to brown, and sometimes with hints of pink or purple, especially under actinic lighting.

Care

Pavona cactus is considered a good choice for reef aquarists who are looking to venture into keeping SPS corals. It is relatively hardy and can adapt to a range of lighting conditions, although moderate to high lighting is preferred to maintain its coloration and growth rate. Water flow should be moderate to strong to prevent detritus from settling on its surface and to provide the coral with the necessary nutrients and gas exchange. Stable water parameters are crucial for the health of SPS corals, and calcium, alkalinity, and magnesium levels should be monitored and maintained.

Symbiosis

While Pavona cactus does not have any specific symbiotic relationships as notable as those seen in clownfish and anemones, it does host a variety of small marine organisms. These can include microfauna such as copepods and amphipods, which find shelter within its structure and contribute to a diverse and healthy reef ecosystem.

Habitat

Pavona cactus is found in the Indo-Pacific region, typically in shallow reef environments. It can be found at various depths, often forming extensive colonies that provide structure and shelter for a multitude of marine life. In the wild, it is commonly found on reef slopes and in lagoons, where it receives ample sunlight and water movement.