Can we guess the gender of oscar by black spots

  • rahul1991
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rahul1991 created the topic: Can we guess the gender of oscar by black spots

Hii This is my first post on oscarfishlover.com

My name is Rahul and i am from India.

I was observing my oscars to get any clue to identify any female in the tank.
I have four O's of around 1 year old, 8 Inches in size.
What i observed is that there is a big spot on tale on all of them(common).
But there is 1 or 2 more small black spot on only three of them. Could it mean that the odd one (which do not show any addition spot) could be a female(opposite gender).????

Thanks for your time
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  • gorgoroth
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gorgoroth replied the topic: Can we guess the gender of oscar by black spots

hello and welcome,

as far as I know you cannot sex an oscar based on any sort of coloring/finnage/... there are only 2 ways.

1. when they are spawning
2. venting them, the reproductive organs are always bigger on a female.

to make this into an example:
male looks like: oo
female looks like: oO

160 gallon south american
190 gallon malawi
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  • bassetman
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bassetman replied the topic: Can we guess the gender of oscar by black spots

You got it just right. No spotting or finnage can tell the gender of an Oscar with better than 50/50 accuracy.


Good judgement comes from experience, experience comes from bad judgement
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  • rahul1991
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rahul1991 replied the topic: Can we guess the gender of oscar by black spots

First of all Thanks for your reply....
i know that we can't tell their gender by appearance but it may be possible and i have read somewhere over the net that there can be some difference in the spots of an female oscar(some chances).
And i want add that the one about which i am talking is the slightly larger among all of them. As it looks large so its vent autometically looks bigger.
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  • Firestorm8215
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Firestorm8215 replied the topic: Can we guess the gender of oscar by black spots

Well , maybe you can find where you have read this and post the link here.

But both Gorgoroth and Bassetman have years of experience with Oscars and other fish and are very reliable with their advice and knowledge.
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rahul1991 replied the topic: Can we guess the gender of oscar by black spots

here is the link www.cichlidfish.com/oscars/oscars.htm

i dont remeber where i read it. But that all what i get....

the post on the link says that if an oscar have 2-3 black spot"eye spot" it may be possibly a male.
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  • ehall67
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ehall67 replied the topic: Can we guess the gender of oscar by black spots

rahul1991 wrote: here is the link www.cichlidfish.com/oscars/oscars.htm

i dont remeber where i read it. But that all what i get....

the post on the link says that if an oscar have 2-3 black spot"eye spot" it may be possibly a male.


Sorry buddy this site you have is not credible not in the least..

it has lots of false info like Jaguar cichlids being good tank mates!? :S

Thats all bad and more of it it just fake opinions..

as far as males being brighter than females? all wrong...

The Confidence of Amateurs, is the Envy of Professionals


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  • Firestorm8215
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Firestorm8215 replied the topic: Can we guess the gender of oscar by black spots

I have not gotten far into this article...but I can already tell you to loose that link and never look at it again. Please.
But yes , they are picky about water conditions. As less then perfect water can lead to a host of problems.
And feeder fish , unless bred by you in perfect conditions are a big no no as well.
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Firestorm8215 replied the topic: Can we guess the gender of oscar by black spots

Holy crap. On the link for the requirements it states to have AT LEAST 50G for 2 Oscars... :ohmy: God I wish we could burn bad articles that are posted on websites.


Here is what it says...

What you REALLY need for a NICE, easy to keep clean OSCAR tank:



A POWERFULL, I mean POWERFULL filter. And if you REALLY want to be LAZY get TWO. I think the perfect combination is a Powerhouse like the Aquaclear 500 that does 500Gallons PER HOUR and the Magnum 350 Deluxe! Yea this AquaClear500 tank will filter through it 500 gallons in one hour. (For a 50 gallon tank this means it filters ALL the water 10 TIMES in one hour!) Now use the AquaClear500 along with the MAGNUM 350 using the "MICROn-Filter" doing 100% filtration, NO BYPASS, and does it at 350 Gallons per water! Why BOTH? Well the Magnum 350 has this REALLY cool SPECIAL filter cartridge that filters out VERY VERY VERY tiny stuff which other filters CAN NOT catch. I personally had to use the Magnum 350 special FilterMedia to filter out some bad algae I had, I couldn't get rid of it ANY other way, chemicals didn't work, large water changes DID NOT work, nothing worked, yea the algae were like Microscopic but were SO DENSE you couldn't see 3inches deep into the water!!!(was a grass-green color) Using both filters will keep your water CRYSTAL CLEAR. The Magnum is a bit more expensive but is really worth it if you want a beautifull looking clear water tank free of even the smallest particles that would make your tank look "cloudy".



You might want to buy the AquaClear 500 First, it is cheaper. Only around $65 from the leading on-line pet stores. BUY-IT-FROM this major online pet store through this LINK. Here's more INFO on the AquaClear 500. and more info on the Magnum 350 Deluxe.

ALSO, the MAGNUM 350 will take a little bit more TIME than the Aquaclear to setup. If you buy it and need help just ask me and I will help you out, just POST on the BBS (Bulletin Board System) here's the LINK to it.

AND I figured I need not mention you really should have AT LEAST a 50gallon tank for 2 oscars. This is bare MINIMUM. Besides with these two filters you'll have a nice 100gallon or Bigger sparkling CLEAN! :)
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  • Nina_W
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Nina_W replied the topic: Can we guess the gender of oscar by black spots

could we somewhere make a rule that any piece of writing that feels the need to capitalise every fourth word is not credible, ever?

Good grief, that's some bad advice.
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