Great pick up that is 100% male cuban Gourami's is female, aslo for comparison unless its a male in breeding dress cause mine has showed dark camo before. but im still goin with Gourami as female.
If it were a 5" Jag even male their would be large black spots running horizintally along the lateral line mabe not always present but they'd show often enuff. They don't really start dissapearing til 7-8-9".Your Cuban is kinda different lookin' to me tho with the goldish body hue, I think all I've ever seen have been white with black spots. Great lookin' fish!