I had a mated pair that spawned a few times. The male was a bit larger. during spawning, the male developed a small dark spot on each side of it's head near the gill. This went away after a time. The male holds the eggs in his mouth. They become very secretive during this time and rarely come out, even to eat. I went several days w/o seeing them come out but you could observe the male with the eggs in his mouth. Never saw any fry, so my sense was that the adults ate them or the other tank mates did. A dedicated species tank is a must. I've often thought of setting up a tank just for a pair of these fish. Even if they don't spawn, they are wonderfully interesting to observe.