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Borellii sexing.


New Member
I ordered my first two Apistogramma Borellii’s (yellow blues) from the wholesaler. I ordered a pair so I could breed but have been told by a third party that they are both males.

I understand they are both very bright but neither have the long tips on the anal fin nor dorsal and they seem to take it in turns showing their belly to each other and follow each other around.

I have noticed they have gotten brighter since acclimating to my tank.

They are about 3cm long currently and not aggressive in the slightest but unsure if that will change. Any help sexing them would be appreciated as if I need to take one back to my LFS sooner is better than later.
Thanks in advance
22EEEDFB E677 4B96 A4FE 1719EACC9FA0
FF1CFE18 3C7F 44A1 AB5B 17413A404B6F


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Brampton, Ontario
I would say that they are two males as well. I am breeding them myself and find that the females are about 1/3 the size of the males and look completely different. Here's a link to a video of mine that shows a female with her fry. Notice the dark band through the eye, and a shorter dorsal fin. In addition, the first ray in the dorsal is black. The males are not like that. Link: Apisto Borellii Opal female with fry

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