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I had level one environment when a few of my fish were born...Greenfin Arrowfish, Flagged Fruitfish, and Golden Leaffish. They were completely healthy and I was just breeding them over and over so I would continue to have the same 6 breeds until I built up some cash. After a few generations, I got up to Environment 2, and their health dropped. Shouldn't I still be able to raise them in a BETTER environment? I'm confused.


Yep, you should, but did you keep feeding them over and over again? Thats how they can also die!