Okay so this guy is definitely a baby striped loach (or at least not a dwarf loach), he's grown much larger than the dwarfs! Second and third pictures are unrelated loaches but you can see their weird "scale" patterns (even though they're scaleless)!
My assumption is that the shrimp were kept as food for other livestock, then colors were (likely accidentally) bred into them. But I can't find ANYTHING on Google about this
At first I thought one of these was a baby striped kuhli and the other two were dwarf kuhlis but now I'm not so sure, any ideas? The store I got them from just had them labelled as kuhlis
For a while I thought this was a concerning behavior but I've come to terms with the fact that this particular black kuhli is just like that. This was a 3ish minute time lapse