P.deissneri ?

I understand why you think so, from the look of the way the spots are on what you can see on the last picture, – that in my opinion could look like deissneri – BUT, – this really does not mean that it is, – you have to put it together with the rest, especially the colours in the tail and there are other species that might look the same. You can see on my picture, – this is not a deissneri, – although it has similar type patterns in the unpaired fins as yours. This was identified as sp. Sentang, – and yet still not certain about that anyway. Very beautiful fish though, which unfortunately I dont have anymore now.

Is there red in the tail ? It looks like that in the second picture.
I would agree with Christian, its still likely to be a bintan type fish, or the others he mentions.

To me the fish looks very much like P. spec. Sentang (“sintangensis”) from Sumatra. Definitely it is none of the species from western Malaysia, and probably it’s none of the well-know species and variants from Kalimantan and certainly not from Sarawak. There are many bintan-like variants living on Sumatra. P. spec. Sentang is one of the most-caught and most-exported licorice gouramis of the last two or three years. In that respect, it’s predecessor was P. “blue line”, equally from Sumatra, which has been exported in high quantities. Obviously, the share of the catches fell sharply after 2008, and the Sentang form replaced them in the lists of the exporters. They tried to push the fish by naming them with the latinized “sintangensis”-name which is invalid since it is not based on any serious description. As it is the case with many other licorice gouramis, many people don’t bother with the distinctions between species and variants and simply call them all the most prominent and oldest name “deissneri”. Martin wrote correctly that this fish is definitely not of that species from Bangka; the true deissneri is simply and clearly to be identified (see our species account). Unfortunately, our scheduled pages in this website on the hitherto scientifically unidentified “other forms” are not ready to be publicized; therefore all the Sumatra variants of bintan-like fish (as spec. Sentang or spec. “blue line” or spec. Dabo or spec. Sungai Bertam etc.) are presently not described systematically anywhere in publications or the web.