Name: Betta pi
I have one of these in a 40 liter tank with a couple of corydoras. Gustav lives very peacefully with them. Whenever he sees me, he floats to the top to greet me - sometimes he's not even hungry, he just wants to say hi. When I bought him, he was a kind of dull dark blue coloring, but after a few days of being in his new home, he developed green and red markings, and his blue is much brighter. An excellent fish, but keep him in something at least 20 liters - he would be miserable in less. He appears to be OK in most water conditions.
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