A Red Cambodian betta with black stripes only on one side of the body! Mabye it's got the marbled gene?
http/www.aquabid.com/cgi-bin/auction/auction.cgi?fwbettasct&1282079402
looks marble but it is a defect in their coloring (marble is a defect gene), not a bad thing but not something a breeder would want in a cambodian line.
marble is not a "defect". just another color variation. its only a defect if you are going for a pure color. to some, marble coloration is coveted.
that is an interesting fish
cheers