Stunning little fella you have there, what's the size of your tank it looks a little bare.
I got my FH he was around 2.5/3 inches he's been in a 120g since day one. I noticed fairly quickly if he was in a bare tank he would sit right in that back corner and only swim about when the lights was off, I ended up putting bunches of artificial plants at the ends of the tank and two dotted in the middle. This made a huge difference and really brought him out.
Now my guys 6+ inches and couldn't care less about the plants, all he's bothered about now is defending he's tank from my arm during water changes ?