Distribution: Australia, Indonesia Coloration: May be solid, banded or speckled in many different colors and combinations of colors Care level: Medium Lighting requirements: Moderate Flow: Low to moderate SG: 1.023-1.026. Calcium: 400-500. Alk: 8-12. Magnesium: 1350-1500. Temperature: 76-82 Growth: Moderate is well fed Acanthophyllia is a solitary, sand dwelling, large polyp stony coral. It forms a radial skeleton with large, fleshy, accordion style curtains which may extend out to the sand in all direction. Short tentacles surround a central, large oral disc and mouth at the center of the fleshy outer curtains. Colors and patterns are nearly unlimited. I've not kept many acanthophyllia during my time as a hobbyist though I have housed a nice green speckled specimen in my tanks for the last year or so. It seems to do well in conditions that suite other large, solitary, sand dwellers although I have noticed that going just a bit under on lighting can cause problems quickly. Low to moderate lighting seems to be best. Acanthophyllia has a very potent sting towards anything close enough to touch its flesh. Give it some space! I feed acanthos very regularly, as with all solitary sand dwellers, which seems to help with the growth and health of their flesh. Dry pellet foods are what I use, but they will readily accept nearly all meat or vegetable based foods. As with all LPS, and especially solitary sand dwellers, stable alkalinity is key to health, color and growth.