Like Helene, I’m no expert in identifying any of these species. However, I have 5 of the fish that resemble fish in your photo. They were sold to me as “sintangensis” or “blue line” take your choice. It now appears that I have two pair. The dominant male has been in and out of his cave for several weeks now. The second male stays to the far rear of the same tank but is making his moves on a second female. His colors are no where near as intense as the primary male. Once a have a new tanks prepared and I’m sure I am not going to disturb the initial pair I plan to move the secondary pair out of the tank.