I am not normally an impulse buyer but when I saw these I had to have them. They had a tag that said mixed zoo rock $39.95 and I couldnt help myself. My pep shrimp has been all over them for the last couple hours so they aren't all open yet. There is at least 150 of the little blue ones and those are the zoas I was curious about. No matter what they are...for the number of polyps I thought the price was good. When they pep leaves them alone and they open up I'll post other pics. Curious what the big ones are also. Thanks for looking.