These have slightly different colour ratios than normal rastas, a shorter skirt and about half the size:
Are they still rastas?
Are they still rastas?
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Size differences can be caused by placement in the tank. I know for a fact that some varieties grow larger under lower light. The reverse may be true for some zoas but of that I am not certain.
I've seen rasta that are so small that you could bearly tell what they are the polyps on the colony where also spaces very far apart not sure what caused this since it was a trade in colony at a LFS.