Once when I went ot sell fish there were 21 fish in the tank. I don't know how I did it and it has never happened again. I was wondering if anyone else has had this happen? What I would really like to see is tank #4 pop up, that would make me really happy.

There was a previous thread about this,Apparently 21 fish in the selling tank was so you could have the seahorse in there,

Thanks so much. That just might be the case. I moved him in there recently and don't recall if that happened before or after. Bet that's it.