07-30-2007, 10:51 PM
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Sexing Plecos can be fairly easy, some species will grow odontodes, males will have more than females, and they are more noticable with well conditioned fish. Sexing BNs is easy with a few species like the commons, but with some others, which the females also grow alot of bristles, can be alot harder. Another way of sexing sexually mature Plecos is to look at their body shape from above, females will have a more rounded stomach.
There is alot of different types of Plecos, some are harder to breed than others. The difficulty of breeding common BNs on a scale would be 2-3 in my opinion, they are very easy to breed going by my experience breeding them.