Don't let them get it!
Although how cool would it be to drop something like a Panerai Bronzo to the bottom of your fish tank and just leave it there fore years and years...
I like the Silver Shark
One of my favourites. I was always partial to Clown Loaches and Botias. If you like fish may I recommend "What a Fish Knows" by Jonathan Balcombe, it's a real eye opener. Kind regards Antony