When I got him a little less than a year ago, he was about the size of a golf ball, he has grown no taller, but a little wider, he know looks like he's maybe 2.5" across, they usually don't get bigger than 3"ish, Hopefully he doesn't get much bigger than that. He runs a good business of plowing my corals and knocking everything down to the sand. As you can see, he loves picking him up, and usually his name is "Trash Heap", as he always has some rubble or broken shells or something on him. The best though was when he picked up a hermit by it's back and he carried it around all day, funniest thing as the crab tried to figure what was going on.
He sounds like fun to have, barring the mowing down corals and being a clumsy oaf part. It's a stunning blue. If I had a larger system with some open spaces, I'd consider it. Him carrying around the crab must have been funny!
Anyways, I flipped the other big rock that the GSP were on in the middle (the one with the blue chalice and all the zoas and the branching monti), and I moved the zoas to the sand and moved the acans to the rock, and they looked instantly better. Will post pics tomorrow, and I decided not to wait and find out whether or not it was STN so that acro that I was worried about is now about 1/2 the size But whatever, it now looks like it is going to be A OK.
Sometimes all it takes is a change in position. Looking forward to the pictures.