Hi catfish,
I've seen this kind of ancistrus before in two german aquariums, lengths from 17-19cm cm.
I honstly don't know what kind of ancistrus this could be, because they look quite familiar with the common bristlenose.
I've heard a lot of theories about these fishes...maybe it is somekind of a mixture of different ancistrus' in european aquariums....or it is somekind of an unknown ancistrus-species.
Sorry, I couln't help much....
With best regards, Anja
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