Fish? at a Garden Centre??

We've had a Dobbies World garden centre recently opened in Dunfermline. They sell just about everyting including fish. I'm not sure what kind this is. I really should have checked. It looks kind of like a puffer fish and is, as I found when the Dobbies man started feeding it , carniverous.

Dobbies has that IKEA effect that makes you come out with an awful lot more than you went in for. I had intended to pick up a cheap pot for Tam's bay leaf tree which with recent rain I found literally drowning in it's ceramic drainless pot. Completely forgot about that and ended up with a very nice pot for one of my bonsai that has been pruned and waiting on proper re-potting for about 6 months.