What type of fish should I, Could I, Get with my 2 Gallon tank?

I just bought a 2 gallon tank today. However I don't know what kind of fish to put into it. I was thinking betta when I bought it but now I am thinking of something different. I then thought goldfish But my tank is probably too small. What do you suggest. maybe perhaps community fish?
are angelfish saltwater or freshwater. could they stay in a 2 gallon?
I have a 10 gal. also. I just need something for this tank.
It is an actual tank. I bought it at petsense. It has a filter pump and heater.
 
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