Typical P. spec. “Blue Line”. Not P. spec. Sentang (wrongly named “sintangensis”); they are less brightly coloured, often with a brownish-greenish tinge in the body colours. As I said often before however, the trade-given name “Blue line” is not unequivocous; the misidentification is a leading principle of the trade of these fishes. We have seen at least three different fish named “Blue line” already, probably more, and sometimes the spec. Sentang is mixed in, too.
But the fish of these photos is a clear “Blue line” from Sumatra. Obviously, the original habitat which was exploited mainly 2004-2008, is still existent, or there are other unspoiled habitats which have not been made known since. The fish was the mostly traded Paro in that times (wrongly called “deissneri” of course). For some years, hundreds of thousands of “Blue lines” filled the trade-tanks in Europe and northern America.
“Blue lines” are beautiful Paros of the bintan-type; maybe subspecies or even the nominate species bintan itself. The taxonomists keep silent about this; they have no arguments without genetic data. The first genetic data we have see no decisive differences to the nominate species. But this maybe provisional.