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I bought 6 Ancistrus sp. 3 in May at 1 inch, 4 killed themselves out of curiousity and 2 survived. One is 2.5 inches and the bristles can describe only a male, and the other is smaller with no hint of bristles at all.

The bigger one is more aggresive, and chases the smaller one. Could they be both males, and the bigger one bullting?

Or could they perhaps be a pair? Because I really want to try to breed ancistrus, if these aren't a pair, I'll just keep them and buy a pair of wild brown(Don't know which species) bristlenoses and breed them.

But still, doing with what you have is best

A male chasing is a sign that it's a male. If the other fish is a female, he will most likely evenetually let her into his cave.

It sounds like the second fish is too small to say for sure yet.

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Mats

Bushy doesn't have his own cave. But as you say, the chasing aggresively is quite suspisious.

Still, I love them for what they are, even if they're a bit annoying at times!(Jump into the filter)

I'll see if I can get the WC Ancistrus pair.

You can't find a sp(3) that is wildcaught, that's for sure. But others can probably be found as WC.

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Mats

The WC ones are not sp.3, I said they are completely brown. They can bought at a place that specializes in rare SA fishes(Discus, plecos, corys, cichlids)

The discus are mosy likely not WC, so it has a chance that the bushys aren''t wild caught. Still, since they're over 9cm, I think even I can sex them easily.

Is there any completely light-brown ancistrus species that has been described?