On the subject of aquariums we went to one near Aberdeen in the summer time and there were some huge pollock. I'd guess 20lb or so. The biggest fish in the tank is a cod, which must be 30lb plus. The guy working there said it has been there since the aquarium opened and must be over thirty years old. Worth seeing.... The tank has no top on it so if one lived there a night dive would be tempting! 
