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Just Curious...


vwashbur

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I've been looking for a clear answer online and hadn't found one, so I thought I'd just ask. I understand how to tell a male from a female goldfish apart using the breeding stars, and tubercles (sp) and that males typically have pointier dorsal and pectoral fins than a female, as well as the differences in their vent area. I also read that the size of the goldfish doesn't so much matter. I thought telling them apart would be much easier...but apparently not :wall

I'm just trying to figure out approximately at what age can I tell the difference, apart from if I physically see them laying eggs or chasing each other around the tank. :blink: I know there's a lot of factors, including the size of the tank, and the conditions of their environment, how happy they are and what not but maybe just a general idea??

I just want to know realllllyyy bad, ya know?

So if anyone can give me insight, I'd be really excited. :D

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Well, I'm pretty sure some of my fish are over 2 years old and I haven't seen a single breeding star yet! :P

The best way to do it would be their vent. Males will have an innie, while females have an outie. I just found a really good picture of it Here

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You know, I'm curious about that too, because my fry is less than three months old, yet I SEEM to be able to see differences in the look of their vents.

But three months seems a bit young to be to be able to try to determine their gender, or not?

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The problem with determining by the vent is that I think I over-analyze. Sometimes I'll look and be absolutely certain that I saw an outie, but then I'll look again and wonder if I'm wrong and its an innie?

In my main tank I have two goldies, Ponyo and Marley and I was pretty sure they were both female. The problem is that I often catch Marley with her face in Ponyo's bum...so then I'm sitting there wondering if I'm seriously wrong? Or if they have issues knowing what sex they are? (which would totally be my luck)

Those were really great photos though Vee. They were super clear - I guess you just need the right sized fish to tell with that method though.

I also don't know if age necessarily matters Fang. I keep reading that size and age don't hold too much importance. You obviously won't find breeding stars on a one month old fry but maybe since you're experienced you can just tell by the body shape and behavior?

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I don't think on my fry, the body shape and behavior gives them away. My adult male comet is just as round as the female shubunkin, so that doesn't help. The behavior of the fry is 24/7 FEED ME FEED ME FEED ME. No help either LOL

That only leaves me the vent.

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There is one other way but its alot harder :o the pectorals and anal fins.... The pectorals on a Males fins will be thicker on the front line edge, the females Anal fins will be thick.

Oh and also Males have firm abdomen while in females, the area between the pelvic fins and the anal fins.

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Oooohhh. I'd like to try this technique. Thanks Koko!

So am I looking for thickness in the entire pectoral fin for males and anal fin for females? Or only the first ray of the fins?

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This reminds me of something I just happened to notice today and made me wonder......

Are breeding stars ONLY on pec fins? Could they be on dorsal fins...??? I noticed my Dom's dorsal fin this evening at din-din time and I SWEAR! there are stars on it...........

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This reminds me of something I just happened to notice today and made me wonder......

Are breeding stars ONLY on pec fins? Could they be on dorsal fins...??? I noticed my Dom's dorsal fin this evening at din-din time and I SWEAR! there are stars on it...........

I believe in the case of some fish, those breeding tubercles are EVERYWHERE. I think Sakura had a case where they were on the scales on the body. Trinket had replied saying that they can extend all over the body. Here's the thread :)

http://www.kokosgoldfish.invisionzone.com/forum/index.php?/topic/84982-breeding-stars-on-the-scales/page__p__960522__hl__%2Bbreeding+%2Bstars+%2Bscales__fromsearch__1#entry960522

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There is one other way but its alot harder :o the pectorals and anal fins.... The pectorals on a Males fins will be thicker on the front line edge, the females Anal fins will be thick.

Oh and also Males have firm abdomen while in females, the area between the pelvic fins and the anal fins.

*imagines trying to test the firmness of a 2 inch fry's belly*

*squish*

:yikes:krazy::crying:

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1.The problem with determining by the vent is that I think I over-analyze.

2.I often catch Marley with her face in Ponyo's bum.

3.Those were really great photos though Vee. They were super clear - I guess you just need the right sized fish to tell with that method though.

I 4. also don't know if age necessarily matters

1. you are correct when it is not the season the vents can appear to look very alike until spawn time arrives.

2. the is an excellent indication that Mr. Marley is a male .

3.The male oranda in those fotos ,Pumpkin, was 3 years old and a very active great breeder fish. he produced many fine spawns for several years.

4. many factors but expect to first signs by about 9-10 months .

if you handle your fish you will note that the males will feel rough like sand paper or a chin that has a day old beard. and that the female will be the most smooth thing you have ever touched, think of the inside of you lip.

here is a Female (on left) and male ( on right) telescope blacks where you can see the strong white spikes on his first ray of pectoral fins. these have just finished to spawn a few days ago and so the markings are evident. fin rays are a very good way to id the fish.

P1080923.jpg

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I believe in the case of some fish, those breeding tubercles are EVERYWHERE.

Oh yes! McQueen has them EVERYWHERE! all the pectoral fins are covered by little rows of them - from larger to smaller bumps. He has the front of the dorsal with some rows - his pelvic fins also have a few rows - also the edge of his tail! Also his belly and cheeks. You can see it a bit on these 2 pics.

DSCN4512.jpg

DSCN4513.jpg

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I believe in the case of some fish, those breeding tubercles are EVERYWHERE.

Oh yes! McQueen has them EVERYWHERE! all the pectoral fins are covered by little rows of them - from larger to smaller bumps. He has the front of the dorsal with some rows - his pelvic fins also have a few rows - also the edge of his tail! Also his belly and cheeks. You can see it a bit on these 2 pics.

DSCN4512.jpg

DSCN4513.jpg

Did you drop some Viagra in the tank? :rofl

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Thanks mikroll. That helps so much! I'll def be looking for all the things you pointed out because fortunately for me, my goldies are coming up on 10 months ;)

And as a side note, Mc. Queen is a beast!...in a very good way, of course. :D

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I was going to show in your pic Captain but I think Pharoh's colors shows more of what Im trying to show...

See on the Males Pectoral fins the front part of it is thick, and the females will have this same thickness on there anal fin/fins some fish have one some have two... but the front edge of the fins (anal or pectoral depending on the fish) will be thick.

I do say its easier on older fish but after you get used to looking for it, it gets easier but I do have to say I my self sometimes cant tell. But I did good this time cause I looked for all female fish and all three of mine are females :)

frontfins.jpg

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  • 4 months later...
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Lol! I have been trying to inspect my babies fins, but they never stop flapping!!! :stop

How do you do it? I am dying to know if they're males or females

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The only absolutely positive way to sex fry and very small fish is to hold a credit card up to the aquarium glass. All the fish that swim up to the credit card and sit there are females. LOL! :carrot:

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How do you tell if a goldfish is male or female?

Turn on a Lakers game and see if it watches. :D

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white colored pectoral fins are really hard to tell on a fish, but if there fins are dark in color normally the front line on the pectoral fin is thick and slightly white in color, then its a boy. :thumb:

If that fin is thin then it will most likely be a girl :thumb:

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