Colonies are usually flat solid plates with well defined margins. Branchlets are short and usually conical except at the sides of colonies where they are inclined and may be only partly fused. Axial corallites are small or indistinguishable from radial corallites. Radial corallites are irregular in size, large and are not arranged in rows down the branchlets.
Uniform blue, cream or pink.
Shallow reef environments exposed to strong wave action.