Right. First they grow to sexual maturity, and then they pair up. One mod said they are not a "pair" until they have produced fry.
For example, I bought six juvenile calvus and was told it would be about a year before they pair up and I have to remove some. Calvus are very slow growers.
both julies and gobies pair up fairly easily.. it's very easy to notice pairs once they do pair up because they will guarding a desired area and will be chasing away all other fish but themselves.. this is when you can seperate them and they are likely to start breeding.. i just got 3 pairs out of my lamprologus ornatipinnis which was only a group of 6.. first noticed a pair, removed the pair, noticed a second pair, removed the second pair, then the 3rd pair formed as well .. had a pair of breeding julies as well, pairing is very easy to notice.. good luck
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