Does she have "highway" morph in her? That's what it made me think of, but keep in mind I pay little attention to the genetics- that's a question for some others here & the reason I stay out of genetics/morph discussions. I just looked up G-stripe & that makes total sense to me. BTW, I'm really glad she's not been scraping her back. I vaguely recall it mentioned that some (BPs) can lose color this way (not specifically in a stripe though) as they mature, but no idea what morph(s) that may happen with. Very interesting.