I caught some killifish in Lake Erie last summer that weren't bad looking. They would be kinda big for a 10g though. (Last summer I did a lot of minnow catching just to look at them and take pics. :P) 
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5 gallon Hex planted - Bee shrimp, algae eating shrimp, oto, snails
10 gallon planted - platy, white clouds + baby, oto, cories
~1g bowl - duckweed, male betta |