Is this the 1.5 gallon tank? I have that same tank (or maybe it is 2gal?) In any case I had planned to put a yellow clown goby in mine but decided it was too small. Even though he's a tiny fish he does like to explore and swim about and the tank really is small. I also have not perfected keeping the parameters stable and after several weeks it is cycled but the specific gravity varies based on how diligent (or not) I am about topping up. (there is no livestock in there, just rock) I am finding it to be a bit more work than I thought and I may turn it into a nano planted tank with FW shrimp.
Sorry long answer, but if it's the small tank like mine I'm not sure about fish in there.