I have a 3 foot tank with a mixture of black neons, glowlights, bleeding heart tetras, neon tetras, cherry barbs and two adult pearl gouramis. I thought that the gouramis were both female, however they seem to be very teritorial and the rest of the fish are hiding at the bottom of the tank. Has anyone heard of or seen a male pearl gouramis with a smaller dorsal fin than the female? I have been keeping fish for 15 years and never come across this situation before! Should i separate the gouramis or add other fish? If anyone has got any advice i would be very grateful!