I had a Blue Ribbon eel 4 years ago,and he eventually escaped,after 6 months.He didn't eat initially,after purchasing it,but after a week,of trying everything,he ate one of my reef fish during the night.I didn't expect that. I fed him a steady diet of Rosie minnows and guppies.They have a huge appetite(mine ate 4 to 5 live minnows each morning at 3 AM ).He was always out on the prowl during the night,afterward.They are very skilled hunters and are wonderful to watch,dragging their victim snagged in their mouth,disappearing into their little lair(consisting of a small pipe he lived in).Then re emerging a minute later ready to snag another Rosie that comes nearby.My advice is to try feeding it with just moonlights on.Have lots of guppies or Rosie's to entice it to eat.Don't give up.I do not know why they are initially reluctant to eat,however,if there are other fish in your aquarium,causing them to feel stressed,they will either,refuse to eat,or (as in my case),eat that fish.