pleco help

So about 2 months ago I noticed weird stuff growing around the nose of my younger brothers pleco, I've owned several plecos before and never seen this, and I wasn't to worried about it someone told me it means its male, but recently its spread more and I was wondering I'd I should be concerned...

Hello all, I have one albino bristlenose pleco (4 in) and one (possibly) zebra pleco (3 in). 20-gallon tank. I didn't buy them so I'm not completely sure about the second one. They have grown quite a bit since I got them and their fins seem much healthier, but they are quite sluggish even though...

Hello! I need some advice.. My pleco is much too large for my 35 gallon tank (7 inches to be exact...) and is getting aggressive towards my other fish! Her bio-load is also getting to be way to much for my filter. I have had her for about 3 1/2 years now and i hate yo give her up.. But i just...

My bristle nose has these marks on him. Are these normal? They look like scars to me? Any ideas please