After a couple days in the tank I noticed some tissue missing from my green brain coral. I floated the coral in a modified tupperware for 2 weeks and it recovered beautifully. After a single night back in the tank it was completely shrunken up and had strands of tissue hanging off, plus i could see several skeletal plates with no tissue. Back to the tupperware. I've heard of the bristleworm issue, but could it be my long spined urchin??? It's the only thing voracious enough to do that kind of damage in a single night.