Awwww

Yes, those are beautiful! Do you know which species you got?
I used to have a L177, got him with my baby Oscar back then. He was about 3 inches and cost me 30 Euro, the most I have paid for a fish yet lol. Back then ppl told me I was challenging my luck because those often will have a green belly if looking from the underside and die after a while. I didn't have any problems though, guess those which make it to Europe alive are the survivors anyway.
Mine didn't grow much at all, maybe to 4 inch, and others said the same about theirs. I did some research then and read they need it quite warm to grow, like 27 C and higher, and a lot of greens. Mine didn't seem to be too enthusiastic though when it comes to cucumber or so, was more after what leftovers of the cichlid food. I gave him pleco tabs additionally where the others couldn't get them, he learned that quickly.
I unfortunately lost him some weeks ago when he had to sit in the bathtub until I had the tank back up and running

Noticed too late that the plug in in the bathroom wasn't meant for anything like 200 Watt and the heater would not work. All others made it through that without trouble.
Not sure though if that about the temp is true for all Gold nuggets. Hope you're luckier.
Here's an old pic of mine from about when I got him, bad quality.
