Acanthastrea - How to tell them apart?

Anyone know what the differences are in acans?

Lordhowensis
Bowerbanki,


I know theres more...

Whats the differences? How do you tell whats what?
 
The easiest way to say it, is the lords have smaller polyps than the bowerbankies. The lords will also usually have more uniform round poypls, where-as, the bower will be uneaven, and often multiple mouths in one polyp. The bowers skeleton are also much larger in most cases.
 
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