How does your fish get a cut?

A fish can get a cut in many ways, from a toy castle or object put into the fishbowl or wherever you are keeping the fish. It may also come from the small rocks you can find in where you are keeping your fish. If it is not a pet fish, a 'wild fish' it may have gotten into a tussle with another fish, or something in the ocean or lake may have cut it. If your pet fish has a cut, i would recommend taking it to a vet, before anything worse happens from it.