OSCARS

Honda12

Feeder Fish
MFK Member
Feb 7, 2006
4,921
3
0
35
Michigan
Ussually it is best to buy about 6 youngsters and let them pair off naturally. Or you can vent the fish to see if they are a male or female. You can search google and probably on here to find out about venting fish. Also males tend to grow larger then females.
 

Ang

I should be a Hookworm
MFK Member
Dec 15, 2005
2,045
11
38
San Diego
Oscars are near impossible to sex. They are one species of fish that dont have any visible variations to determine sex.
Well, they do have visible signs, but they are hard to see. You can try giving them a lot of food and see if the female's .....parts stick out (forgot the name)

One sure fire way is venting, but i dont recommend that unless you really know what you're doing.

You most likely wont be able to tell until they are mature and start displaying spawning rituals. Even then, two females will sometimes display like a mated pair.
 

sour_girl

Feeder Fish
MFK Member
Jan 13, 2006
1,199
1
0
44
Toronto
It is very hard to tell just from looking unless they are mating... you pretty much need to get a bunch very small and see if any pair off...
 
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