Tilefish Habitat...
Makomike,
I found an article on the web(can't find it again though) about Tilefish habitat that jibes with what you are saying.
I was considering one of the Jamaica Tilefish trips (started up again last spring after a long hiatus) but didn't go as the catches seems poor...turns out they really found 'em on their LAST trip.
Anyway, Tilefish live in burrows like rabbits. They need a specific type of bottom to dig in..not too hard, or they can't dig the burrow...and not too soft, or their burrow will collapse.
On the east coast, the geology of the shelf break is that there's a VERY narrow band of the right bottom. It's a specific type of shale bottom, I think.
This was one reason why they were wiped out so fast by the commercials (beyond them being very slow-growing and not spawning well, like most deep water fish); once you found the habitat they were ALL there right on top of each other.