When we got our betta from the petstore, we were under the impression that the red color on his lower fin was a natural color. But after going through some other sites, we're now worried it might be an infection.
Neptune does not show any outward signs of discomfort and the red color is confined to the same space as was a week ago. He is happy but we just wanted to be sure this is not the advent of fin rot or some infection.
Do bettas display multiple colors as ours does? Or are they just one bright color and the red is a cause for concern? Please help!