I just got 2 of these I think, bought as Colombian woodcat but IDed them as this species. How can I sex them at about 12cm size? The store was selling them as Fisher's woodcat, which they seem not to be, so I tried seeing them by the dorsal hump and wasn't very able to of course. I now saw the males have a modified anal fin. But how do I really spot this? What's the easiest and sure way to sex them at this size? I could get two more if I have to, to increase the odds, but wouldn't like multiple males fighting for example.
They are in a 200g tank
Thank you very much in advance
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