about how old did Panda lost her sumi? for breeders, it's obvious that majority of their fish will be sold before reaching 4/5 yrs old. so losing all sumi is not a concern but for hobbysts who plan to keep the fish for decades, it's something to think about.
on the other hand, having two fish in one body is not a bad thing. it's a matter of taste I guess.

)
Steve