This is to warn other members here. We have a newer member on the forum who ask for an id on a possible problem pest on his tank. It was a polyclad flatworm. He was advised to remove it and refrain from selling or trading to avoid spreading them to others. He has ignored this and recently traded his pink and green zoas. With a simple search you will be able to find who this is. Actions like this are not cool and are bad for the community.