[Peter Finke]

Martin, unfortunately both of your pictures are too dark to say safely what it is.It is a form from the bintan-complex, that’s for sure. And it is probably not bintan itself but most likely spec. “Blue line” from Sumatra which was imported in high numbers during the last years. Wonderful fish, in my view more beautiful than the nominate species bintan. The hitherto undescribed “blue lines” are most likely no “new species” but a subspecies or a semispecies to bintan, but I am not sure whether bintan itself will be a valid species. In any case there are a lot of variants close to bintan to be found on Sumatra, say spec. Sungaibertam or spec. Dabo or spec. Sentang. We must see especially the colour of the Caudale more precisely. With spec. Blue line it could often have a slight brown or nearly reddish tinge in the dark center. But often this is to be seen only later when the animals are grown up. And – alas! – there have been different fish already been sold bearing the name “blue line” in trade. The trade business is hopelessly overcharged with this question of determining the fish of the bintan-complex rightly: anyway, mostly they are sold as “deissneri” (which is nonsense, of course). Your fish are still rather young, from this year. Wait, but for sure: They are beautiful. I hope you have females, too? – And I give you the advice to buy the anjunganensis: They are easily to be identified and they are beautiful too and relatively easy to be bred.