If you check the species page for Parosphromenus gunawani on this site it will show Danau Rasau as the source location for this species. This species was officially documented in December of last year along with Parosphromenus phoenicurus . These fish were collected by Horst Linke on two specific occasions but to the best of my knowledge have never been commercially imported and offered for sale. They were offered commercially earlier in the year both in Europe and the U.S. but proved to be misidentified. They were again offered this past week in the U.S. (I assume in Europe also) by one distributor and one can only assume that they are once again being misidentified. I am considering bring in a limited number just to examine them first hand.