Only just come across this as I only found the site today, and as I have a 14" MBU in a very large tank I thought I'd look them up....Sadly I come across your thread about Boo! What an amazing fish! They have such characters and I've always felt that the only reason that they live in water is cause they have to but I know mine would much rather be out of the tank doing more of the stuff we do...he's always watching tele, watched the kids kick a ball about in front of his tank...he's a real get involved with the family fish.
You must be gutted by this I know I'd have to get another one if I lost mine....Did you ever get a replacement for Boo?
Regards
Mark