It is possible that the mandarin was dead first, because I've had it for less than two months. It was very active, and it hadn't gotten skinny (although it was not eating prepared foods), but you never know. . .
That anemone was pretty sticky, and had enough sting to leave welts on my hands, but I'm a sensitive gal!
Thanks for the input, Maxx! Either way, I'm bummed to see the mandarin meet its end.
Oh, and the lyretail is quite a character. I have had him for 1 1/2 years. It used to insult my scooter blenny by treating him like a rock. If ever the blenny would hold still, the anthias would sit on it. Not aggression per se, just though he looked like furniture I guess!