for the gouramis, u have two males. they both have color. the females are much uglier and have no color just silver. the angels u wont be able to tell at that size. only when there breeding tubes are showing when theyre bigger. As for the killies the big one is the female and one with the red fins is the male. female killis have dull color or paler than the male or no color. seems like that ur only pair. hope i helped 
