Help sex my RTM´s

[nuno landeck]

Hello, I have three red tiger montaguense and liked someone give me a help to sex them.
This RTM has about 4 "

This other RTM has 4,5"

Finally this RTM has 2,5" and is the smallest in this photo

 

[nuno landeck]

I put all three in the same tank of 120cmx60cmx60cm, the two largest RTM fought in the beginning, but now has struggled at times walking behind one another to bite a little.

 

[Aquanero]

I can't tell the sex of the small one yet. The 4.5" one is e female.

 

[nuno landeck]

And the RTM 4"?? M or F??

 

[Freshwaterpredators]

I am not an expert with rtms but i agree with Aquanero on the female and the first one looks male, not sure about smaller one. maybe try to get a better shot of that one

 

[Aquanero]

Sorry I left that out the 4" looks more like a male. The small one might still be too small to sex 100%

 

[nuno landeck]

I want to be a couple but only have these three rtm and Portugal is a very rare species. I also think the rmt 4 "is a male and the 4.5 " one female, this based on the help they've had here in the forum. I wonder if the best way to make a couple is to keep them together in an aquarium or make links grow in separate tanks at least until they reach sexual maturity, what is your opinion? Right now they are all together in an aquarium 160cmx60cmx60cm along with a couple of JD 11 male and female, 8 ", but the two RTM, the" female "always walk behind the" male "and trying to bite dominates the aquarium, my fear is that it kills the male.
Thanks for the help.

 

[Freshwaterpredators]

At 4 and 4.5" they're already mature enough to spawn.

 

[mbeatrice]

the larger one is 100% female ..the smaller one im leanin on male cuz it seems to have more spotting in the face and fins, but still hard to tell until about almost 4 inches....