1 - 2 inches polyp. Notice the lower photo where you can compare the green ricordea with the blue ricordea.Ricordea is a type of mushroom coral of moderate size. It can be identified by the fact that it has contrasting raised dots across its surface.In general Ricordeas prefer higher lighting. In its natural setting it grows in areas of light, blanketing the rock.It is not necessary to target feed the ricordea, it takes nutrition from the light and from marine snow and other nutrients found in the water.The Ricordea will tolerate many water conditions but appears to do better in water that is low in nitrates and phosphates. Ricordea are not true corals and are related to Anenomes.