I came home from work tonight and spent a few minutes of wind down time in front of the tank. My three year old asks "Where's Piano Teacher?" That's her name for our Yellow Tang. I found PT stuffed in the LR, half eaten - presume by the Strawberry Crab. That crab is too slw to ambush a fish, and really NEVER leaves the rockwork in daylight, so I am certain it didn't cause the Tang's death.

PT was eating well. Had a nice fat belly - I even said as much just last night... Color was always good. No indication of infirmity. Water params ar typical and reasonable. We did introduce some SPS Sunday along with a starfish. Nothing I'd suspect of trouble.

Any thoughts on things to look for?

Also, I felt it wisest to remove the carcass from the tank. To do so, I had to seriously take down half my rockwork. Was I correct in doing so?