Pristella tetra ( xray tetra ) Pristella maxillaris are hardy and undemanding fish.

I keep the variety profiled at the above link. I'm not sure if this is the wild type, but it's the type that's readily available to me and what I keep. I've seen the golden pristella color morphs and they don't appeal to me as much as the xray type, but that's just me. The goldens certainly have their place in the hobby. The OP certainly has enough room in the 75 gallon tank for a shoal of 15 and I'll wager that they make an impressive display.