This is strange. I don't think I have these things, but on my yellow polyps rock, there seems to be some pinkish polyp-like things growing. They look like yellow polyps, but has less tentacles. Is this another type of polyps that grew on the same rock? I also have some really small brown ones too on another rock. They're so small, it's hard for me to compare it to the picture. Thanks for the picture by the way.