[bchristie]

By your "calculations" of a 10 degree drop per 100 FSW, you would be looking at temperatures of approx -90 degrees F at a depth of 2000 FSW...try again.

Many deep water species are kept at public aquaria, I can think of approx 2 dozen species I've kept in my time in this industry...but the group consensus here is right, something indeed seems "fishy" here, so I'll ask again, if you can name the species perhaps someone can offer some advice.