Yesterday, I got a female veiltail female betta from the petstore and i noticed she had stripes. She had stripes while she was in her tank at the petstore. I thought it was just coloring so i got her. She was in a tank with other betta fish and guppies. So, i thought it was a cool betta so i got her along with a fancy guppy. But on the car ride back, i noticed she didn't have the stripes any more and i just thought it was a glare. But when we put her and the guppy in their new tank when she got in the water she didn't have the stripes anymore. When i went down to get the frozen brine shrimp and then came back with it, she had the stripes again. She has had them ever since. What's going on!