I'm not seeing arroyo in that girl but she could be a really low expression since she looks different than a regular pastel does (pattern wise) but I don't see any stripes along the dorsal like you typically see on them. Do you have any other pics of her that show more of her sides stretched out?
I just started working with arroyo and its a bit tricky to ID because its so subtle and the way it interacts with some genes isnt really how you would expect it, if that makes sense lol
I paired my Mojave Arroyo to my OD Fire YB and got some crazy looking babies, I know for sure one is an arroyo YB. But there's a couple clutchmates that look arroyo too.
Best way to prove yours out would be to put her with an arroyo male and see if you get a Rio.
Here are pics of the babies I made this season.
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Those are some beautiful babies.
I'll have to do that. She's only 180g right now. So I've got a few years.