lol, trust me it's a Cuban gar. It's clearly atractosteus not lepisosteus, and it certainly isn't a gator or a tropical.
Many gars vary a lot in colouration, with the individual specimen and according to mood etc. Even spotted and longnoses I've had.
With all due respect, anyone who doubts it's a cuban doesn't know what they're talking about. There's simply nothing else it could be with it's tail pattern and colour, body colouration, snout, and lack of spots on the body.
When it was in the growout tank until a couple of days ago it's colouration was more similar to solomon's gar in this pic (from primitivefish.com)
Yet here is either the same gar or a gar from the same batch looking completely different due to being in a different tank...
Once settled in his previous tank, he looked more similar to that first pic. Yet he was still a bit darker and more of a gunmetal/bronzey colour.
This could be explained by the fact that all of the Cubans imported to the US were farm bred in Asia, as well as of course the Asian members with Manjuaris. My Cuban is from Cuba, not Asia, so it's probably going to look a little different, as the Asian bred ones are inevitably all from similar lineage.
Here is a shot of my gar from underneath to show it's broad and short snout. Looking at it in reality, from above, it's snout is pretty much as wide as it's body, there's not much in it.