The only useful information I have found is in the original description of H. salweenensis, which gives distinguishing external characteristics for identifying all 6 species. According to this paper, H. salweenensis has 24/25 lateral line scales on the body plus 2 on the caudal fin (total 26-27). H. ampalong has 25-27 plus 3-4 on the caudal fin (total 28-31). My problem is... apart from not having a clear picture yet, I am also not sure where to stop at the gill end, or at the tail end. I get 26 in between these 'ends of uncertainty'
Would you like to give me a more experienced count? Please?
Here are my specimens...


Here is a link to the description of H. salweenensis. The diagram at the top of the second page shows the LL.
http://www.wdc-jp.biz/pdf_store/isj/publication/pdf/40/404/40401.pdf
I think they are H. ampalong for various reasons... there are no black margins in the caudal lobes; the mid blotch touches but does not cross the LL (very different when compared to Fishbase's picture of H. salweenensis, if it is correct); also both blotches are a more laterally compressed shape, and smaller.
A LL count, or even your opinion, would help me a lot. Or a suggestion of who to ask.
