My girlfriend uses real money to buy her fish, too. But she isn't freaking out. She is sitting and waiting for the glitch to get over with. So, don't state "those whom spend RL money on it, blah blah."
Needless, clam down. It's a glitch, that happens to sites - so chill out, they are not doing a "mean joke," they are probably fixing it, as they stated before, just because they don't reply to every topic made does not mean they aren't fixing bugs.
It has nothing to do with the Halloween Event, if you notice they are updating the tanks again. The added a new quest with new features. In which they let you "practice" booty on your own tank.
They also added a speech bubble on the fishes head if you haven't named them yet.
They are improving the tanks for new comers.
You would obviously had notice that if you bothered going to your own tank.
So, please, all of you chill out. It's just a game, you lose a couple of hours of income, oh my.