Sexing/pairing butterflies?

Zante

New member
How would you go about sexing and/or pairing butterfly fish?
I'm looking in particular at falcula butterflies.
 
AFAIK can't be done. Best bet is buy a few (like 5) let them pair up, and remove the rest. Even then, not sure this works long term.
 
I was reading somewhere that two males will lay eggs, but two females won't. Sounds unlikely, but I've learnt to look up unlikely things just in case they are true.

Also that same sex pairs are common because it is easier to defend a territory if there's two and if an opposite sex can't be found same sex will do.

Is anyone able to confirm or refute the above?
 
That's all wrong...

Males don't have eggs, females do.
Also they don't "lay" eggs, they are broadcast spawners.

As far as I know, they form monogamous pairs. Occasionally they will group together, but usually for food or some odd reason, not normally.

I have seen it work a couple times if you get a bunch of small juvis (like ten or so) and let them pair up, they will stay paired, but trying to pair two fish is a waste of money, and not many people have the space to try out ten fish.
 
I've paired Semilarvatis and Pakistani in the past and have bought groups of fish and let them pair off on their own. None were juveniles.

They stayed together their whole lives.
 
Generally speaking, would introducing 2 random unknown-sexed same species butterflies at the same time be a bad idea? could be 2 males, 2 females or one of each. Would they just fight each other in all 3 cases? I guess the rare situation would be that they do pair up.
 
Those are, coincidentally, species often found in groups. Do you think that has something to do with it?

Could be......maybe less squabbling between all of them before the pairs sort things out.

Semis have a group dynamic, but not as clear cut as anthias do.

I was lucky with the first 4 as I got two pairs out of them and one pair was dominant towards the other. I had both pairs seperated for a time and then when I moved them to a 180g they were all fine together.

I later added two more smaller ones that were paired and when I got them in my tank, one turned on the other. I had to remove one and went quite some time with 5.

A few years later the one that was bullied and removed was paired with one of my older ones and they got along fine.

Using mature fish is easier, because you'll know more whether they are male/female. With juvies, two may get along and then when maturity kicks in you find out they aren't compatible. That's one of the isssues now.................I don't see larger specimens come in anymore.
Back then it was common to see two 7-8 inch specimans for sale. They are so beautiful when big like that. because their bodies round out more and take on a saucer shape.

On the pkastanis, I think it helped the tank was croweded. I put in six 4-5" adults with my Semis, a Purple Tang,and some small dither fish.
Who knows, the tang may have helped as he was the boss.
 
Last edited:
Back
Top