Since they are (half) GSF (or RES or ...), they are probably less capable of multiple spawns than BG to some degree. Plus, Norm, I bet the F2 generation has a lot of gene combinations that prove fatal at the egg or fry stage, making recruitment from HBG even lower. No info on that point, just a hunch.


"Live like you'll die tomorrow, but manage your grass like you'll live forever."
-S. M. Stirling
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