whatisit

I’ve only got one of this fish left and wanted to get some more but I can’t figure out what it is

So, I finally got cycled two nights ago (fishless cycle, took 18 days).   I have a little fluval edge 6 gallon with two anacharis plants and one anubis.     I wound up with a stoway assassin snail and one other "common snail" I think....that one is super teeny.   Anyway...I have seachem flourite...