where is a place to look at the larger zooanthids, (the polythoa :spelling?)

[marinerules]

i have some of the larger polyp zoanthids, i think they are called polythoa, or something like that ,

they grow very very very fast in my tank, ive had some for 3 weeks and they have doubled in size,

I was wanting some more of some different colors, the ones i have are a orangish brown