Yesterday my wife bought this for me as a bday gift. I was at reef raft staring at it for an hour, watching it eat. It ate pellets in their tanks, but not frozen. They also informed me they've had it for about 3 weeks now. So I figured why not try. Give it a shot. I know the odds aren't in my favor, based off what I've read off various links and searches. But one common thing I read is that if the specimen in question is from hawaii, and eating in the store, odds are improved a bit.
Took it home, wasn't eating the new era marine pellets I have, nor any frozen.
Today I tried some Capelin roes from the asian supermarket. While most of the other fish gave some interest towards it, the idol didnt....Or at least not that I can gather. However I did see it picking at the rocks over the last 15 minutes I watched the tank.
Tomorrow I'll go look for some new life pellets and see if I have better luck.