It's a
with long fins and it's largely amelanistic with the odd melanistic spot.
Unusual it is indeed, but unless the spots are in the "right" places, I think they would count as deformities rather than beauty spots. Some forms of Koi and goldfish have all manner of spots and blotches, and the placement makes all the difference between expensive and not so expensive.
I personally think this is not something to aspire for in Catfish, but I guess it's up to each and everyone to have their own opinion on that.
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Mats