I have a dedicated Shubunkin pond, they had babies and I ended up with 2 coloured and 18 black. They started disappearing including the adults and realised it was rats so ended up with 3 black ones left after getting rid of the rats. They are now 2 1/2 years old and still black. The fins are all black except for the inner edge which is white. I can't find anything about black Shubunkins anywhere. My other large pond has many black fish, some only change after 10 years but most change within 3 -4 years. I love having black fish as they add mystery but don't know anything about black Shubunkin. Will they change?