I know Oscars are one of the hard ones to tell and I'm not sure which is which. I have two Oscars and I am pretty sure they are M/F they are just too chummy, hence their names Ebony and Ivory (living together in perfect harmony) Here is a Pic can anyone tell for sure?
please dont vent your fish though. its stressful on them and doesnt really accomplish much unless you specifically bought them for breeding and need to know
Vent the fish......Squeeze each of their genitalia untill a tube pops out...Thick(er) tubes are females and thin, sometimes backward angled tubes are male.....