Here's a pic of a polyp of some sort that hitchhiked in on a batch of LR from last may, actually started out looking like a tiny zoa... we've been watching it grow every so slowly ever since... now it's 3/4" across or bigger and a few babies starting. Don't know much more about it other than it loves brine shrimp. The green coloring on the inside got a little washed out in the pic.