'Tanked': The best underwater reality show

Did you know there's a type of fish that can change gender during its lifetime? Or that there's another fish that looks like a candy cane? Or that sharks ...

OK, I'll stop. I think I have become a little fish-obsessed.

Last weekend I found myself fascinated by a reality show on Animal Planet called Tanked. The best way I can describe it is it's sort of like an underwater Ace of Cakes.

Tanked stars...