Guppies: Blue v. Teal by Night

[Fish Folk]

I’m selling guppies to a friend today from my “mutt guppy” tank. Last night I checked them after lights-out, and noticed I’ve got two very different color forms of blue…

I guess the 2nd one looks green! By normal lights-on, they look similar. 

[Native Keeper]

time to selective breed! If you want to, of course