I Have Two Original Oscars That I Like To Know How To Tell Male Or Female?

It is very difficult to determine the sex of oscars just by looking at them. Pretty much the only two ways to do it are to "vent" them and watch them breed. Venting is done by looking at the openings on the fish's belly. The one closest to the head is the anus and the one closest to the tail is the vent (reproductive opening). In males, both openings should be roughly the same size (oo). In females, the vent will be larger (oO). That said, venting is somewhat controversial. Some people say it doesn't work and others swear by it. But even the ones that say it works say it also takes some skill and experience to do it reliably. The only other way to determine sex is to witness a successful spawning. The first indicator of sex will be the breeding tubes. Males will have a pointed one (V) while females will have a more blunt, rounded one (U). Also,the female will obviously be the one laying the eggs. However, sometimes two females will go through the mating ritual so even though one lays eggs, it doesn't necessarily mean the other is male. That's why it has to be a successful spawning that results in fertilized eggs. Then, if there where only 2 oscars, you can assume the other one is male.