I had a Greenfin Spotanus that maxed-out at 9999, and I kept for nine months after that. It finally died while I was away for three days in July '07, even tho I had taken the game down to 1/2 speed before I left. That little fish I'd had for about 1 year, human earth time. I still miss it.
Btw - you will find me as 'Dannny' on the leader's board, currently at #7. Does anyone know of a site link where the current leaders can discuss their games? I have yet to find one. Thanks - stork