Yeah there's a ton of little guys that can go into a tank that size. Just a matter of what you think you like to look at the most. I like the yellow head jawfish too.
Firefish jumping? I guess they can, but then any fish can "jump". With a piece of plastic mesh screen or just plastic window material(cleaned daily to keep light levels up) would work once cut outs for filter and such were made.
"You Killed Fritz!"
Bakshi references are always cool!