Ill never know.. dont even have the body for necropsy.
Ive had that vlamingii tang since Jan 2010, and that recent pic showed he was perfect on the outside. I last fed him 5 nights ago and he was a pig as usual. I fed daily 2 clips of nori the week before the trip. An autofeeder dumped in mixed flakes and NLS pellets twice daily while I was gone.
I have seen him sleeping next to the RBTA. How many fish that have died 1st and floated into anemone go in head first?
Just last week I lost a fat healthy Anthias to my RBTA. I didn't witness the kill, but I can't imagine that it would have died spontaneously and drifted in. She was a super healthy fish.