Would a Snakehead be able to live with another fish in an aquarium?

That totally depends on the other fish.
 
I'm guessing his question is hypothetical since it's a bet. I doubt he's asking for stocking advice (at least I hope not).

If the question is indeed "Can I house another fish with an 'adult' Snakehead in a 100g tank?," then it's not likely to work out.
Let's say the tank was over 500G, then there are numerous fish it could live with long term.
 
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