I have a pair of jaguar cichlids and the smaller lighter colored jag which is about 4 to 4.5 inches has been filling her mouth full of sand and piling it up in two other places in the tank. The larger darker jag which is about 5 inches stays right with her sometimes circling her and even appears sometimes to be rubbing up against her. The only time he leaves her is to chase away other fish. Is this their breeding behavior and are they big enough to breed at this size?? First time keeping jags and I am just trying to learn these fish. Is there any special care they need at this time if they are breeding??