http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=discus-#1 my Girlfriend and I have started a Discus tank all is well with the tank and the 5 fish we have are doing great. I see the larger ones doing a shimmy with each other and I wonder if this is a prelude to mating? if so, how do I tell the guys from the ladies? We have a quarantine tank that can double as a breeding tank. Are we going to be proud parents? sparkie95436 2011-03-25