Betta sp. wajok

Here is another 'species' that I don't know much about. I've been after Betta sp. wajok for a little while now, as I have noticed that there is quite a variation in the appearance of fish that are being sold as such. My pair came from Hermanus Haryanto, and arrived in Australia on the same shipment as my Betta miniopinna. 

One of my sp. wajok only a few days after arriving.

According to Hermanus, his Betta sp. wajok are bubblenesters. Interestingly, while his fish are very similar in appearance to the red form of Betta rutilans, I have seen fish that resemble Betta sp. cf. rutilans green and who reproduce by mouthbrooding, also described as sp. wajok. 

It is this sort of ambivalence surrounding this fish that both interests and frustrates me. I will be curious to see whether in the future, Betta sp. wajok is ever officially described. Unfortunately, this process does not seem to be a quick one, so I doubt the confusion will be cleared up any time soon. Therefore, if anyone has further information on these fish, please do comment. 

At present, I am keeping my pair in a 45x30x27cm tank. It has a substrate of clay aqua soil, and the water is kept dark through the use of rooibos tea and IALs. The temperature is around 24 degrees Celsius. 

On a final note, I find this species incredibly difficult to sex. The ventrals and fin size are very similar between the two, and both fish have fairly streamline bodies without that rounded look a well-conditioned female gets. I haven't seen any courtship thus far, although one individual is clearly dominant, and spends a lot of its time pursuing the other. 

I will try to get further photos of these fish later today, as I would appreciate some help in identifying the female.