It's been a while since I've taken a photo of my favorite Zoas. I got a single polyp of these Caribbean Blue Zoanthus from Sealifeinc.net in 2007 for $5! I think they sell nano frags now instead of single polyps, which makes more sense. They also have larger colonies for those of you with less patience than me.
I used to have these in my seahorse tank (before it was totally non-photosynthetic), but I had to remove algae from all around them all the time. I moved them to a coral-only tank in August, and they are doing much better. I think the lighting is better, and the water quality is pristine.