Betta's color transformation

[opaline]

Here's my boy, I picked him up at 4 months old and he was labeled as opal. Got a couple pics to show the progress - first one's from April, second's from today. Marble might be a better fit, haha.

[velvet8]

opaline's delta is indeed carrying the marble gene, and possibly even the grizzle gene. Fluxx's young age at sale often means their colors and patterns transform significantly between 8-12 months old.

[opaline]

Just learned about the grizzle gene, thanks velvet8. Now I'm curious about other genes too, gonna do some reading tonight.

[velvet8]

I just found out about the grizzle gene myself, I guess it's pretty new - apparently wasn't widely known till 2019