i have 6 black skirt tetras i believe i have 3 females and 3 males. two of my larger fish to which i think are females seem to be getting fatter, ive cut down my food a bit but they still seem to be growing. i have also noticed my smaller bs which i think are males swimming beside the females doing a fluttering motion almost like courting behavior. is this possible? i know they are egg layers and when they spawn the males fertilize the eggs as they are dropping is this correct information i have read? what are some other things to look for if they are possibly getting ready to spawn?