My Oscars have been showing breeding behaviours for about 2 months now and no sign of eggs as far as I can tell.

They constantly dig a hole in the sand to the bottom of the tank and guard it for a couple of days sometimes and then they cover the hole up. This is repeated almost every day and they are both aggressive to each other until one gives in then they just sit there next to each other over the spot.

I am still not sure if they are a male and female. I have never seen organs protruding as far as I am aware. Is this behaviour sometimes shown between two males or two females?

both male and female o's will dig and show signs of courtship. at sexual maturity (about 12-14 months) you should see the first batch of eggs arriving (Assuming you actually ahve a female) and if you have a mature male the fry will follow in about 3 days. im not sure if two males will go through the mating ritual but i beleive that 2 females will. only when you see the breeding tubes or fry will you know if you have a mating pair