Jaw fish tank


Reef enthusiast
I want to get a small fish tank for just a couple of jaw fishes. What's the smallest size you would recommend?
I see. I guess 40g shouldn't be too bad. Don't have much room for the 2nd tank. Do I want a long one or a more square-ish one?
I would assume that more space on the ground would be beneficial, that way there's enough room for two separate burrows and maybe less chance of aggression.