Well, i dont know wat to do with ure goldfish. My goldfish and my beta fish never have done that. Maybe u shuld ask a profesional fish person. DO NOT ASK WALMART OR STORES LIKE THAT THAT DONT KNOW WAT TO DO. Once i even saw a beta fish killed because they didnt know that beta fish think they are very pretty(which they are), and they will fight with other fish. We even told an employee, but he was bozo enough not ta do anyting.
Well, i'll see ya round'
How bout buddies?