This variety is differrent than the tree sponges I get from GCE. I once got a similar sponge from Reeftopia, however the largest I ever saw was 6”. Aquadome had a red one as well. I was not confident enough to grab both of them. I have had it now for 72 hours and I can see it likes where it is. The dome was closed yesterday and if the red sponge is still there, I will get it.I hope it thrives! I like the look a lot. If it was an SPS coral, it would be called some crazy name and sold for a very high price. lol.