Breeze said:
  They are  landed on the East  Coast,  but I've heard tell that most of the catch is  airlifted to Japan and China, where it fetches  BIG money. 
That must be why we don't see it any more in the stores here, because we used to find it fairly often and it was relatively inexpensive.  I also read recently that the fishing techniques to harvest Monkfish are dangerous to other fish, so it is on the list of fish to avoid.