Many people value the mutant fish as a treasure, but the mutant paraloach is very rare in the Yangtze River.

Many people value mutant fish as a treasure
The mutant paraloach is very common in the Yangtze River.
I don’t know why there are so many variant individuals.
But the traits of these variations are extremely unstable.
Usually they are brought back for a period of time.
All will disappear.
Primitive fish