Nice looker. Definite holdback.
What are both of your Tessera's het for?
I see similar pattern pop here and there from non-tess, from pairings of non-related lines, and there's a lot of 'dorsally-stretched-connected-lined-pattern' morphs and around.
I SUSPECT it MIGHT be some sort of basic primitive trait, maybe some sort of on/off switch/gene at play? And even then, there might different genetic reasons for pattern anomalies. Some play well together, others- not so much.
Your baby has pretty colors too.
Thanks for sharing.