It is monotypic, being represented by the single species Mussa angulosa, commonly known as the spiny or large flower coral.

Mussa angulosa is a colonial species and the whole clump forms a low dome that may reach 50 centimetres (20 in) across.

The colour of the polyps is variable, being grey or pale brown with green, pink and purple shades.

[2] Mussa angulosa occurs in the Caribbean Sea, the Gulf of Mexico and the Bahamas, and on reefs and banks off the coast of Texas and southern Florida.

[7] Mussa angulosa is a reef-building species and is aggressive, attacking other fast-growing corals that start to grow close by and threaten to overgrow it or shade it.