I was wondering if sexing a young goldfish by looking at it's anus is accurate. Do I need to wait until the fish are at breeding age before I can look at their butts, or are their butts always innie or outie?

Thanks,
Josh

sexing young goldfish can almost be impossible with some, i find, the older they get the more noticable there anus will be, but the best way to tell is just wait and see if they get breeding stars!