It takes both. Genes are a slippery slope unless you KNOW the history of all ancestors. There are genes, recessive genes, etc.
But, you're right about proper nutrition.
It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.
Without a sense of urgency, Nothing ever gets done.
Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP
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