Can Any1 Help? Need Feedback

Hey, I need help with this issue...

I owned 2 fh, always been kept in seperate tanks, but now i put them together in one tank with glass separator.
However I dontg know which one is male and which is female.
Once seperated, they both started to act weird, shaking themselves from times to times...
Now on one side, it seem to be cloudy and have stiky stuff stuck to the glass on the side of the FH wid kok so im thinking that those stuff might be his sperm but not really sure...
I think i'll put them together 2morrow and see cause last time they fought like crazy.
The one im hoping is female is mean as heo, kept on trying to bite my fingers everytime I try to feed it, jumped out the water couple of times 2, I dont know how im gona clean the tank tomorrow, she gonna bite da heo out of me man...
any1 wid breeeding experience pls help wid some info..