indeed the picture looks like an opaline gourami
these fish are great to start with, they're pretty hardy and react great to feeding times
make sure to get a plenty of females to males because it calms down on aggression. i have 4 females to my 1 male and there is no longer any aggression and all the fish look amazing. they get very dark when they're emotional or territorial but they always display their dark coloration on the lower end of their bodies. the love algae wafers and will dominate the wafer when dropped in the tank. to the saddness of the amanos and otos.
these fish are great and are very enjoyable to watch with their little feelers. I've noticed the females do a sort of dance where they turn their bodies parallel to each other and they turn their bodies so they form a circle. they do this for a minute or two. im not sure the reason but i've seen it done once or twice. the females are easy to differentiate because their dorsal fin is more rounded and they have a plumper boddy and the males have a longer pointed fin. also the dominant male turns a bit orangy and blue, it looks really nice and he shows his coloration well during feeding time.
great fish, you'll definitely love it