Boulder Star Coral

Montastraea annularis

There are several ways in which this coral species builds it's structures. It is believed that the coral's environment determines whether the colony grows in a 'lobed', 'mountainous', 'flat plate' or 'boulder' shape. Can you guess what 'style' each of these structures would be called?

ICUN
Status: ENDANGERED A2ace ver 3.1
Pop. trend: decreasing
http://www.iucnredlist.org/details/133134/0