I am currently starting a nano that will have a gulf toadfish, (Opsanus beta) that is in quarantine right now, then he will go in a temp 10 gallon. Until I can get the display tank built it will be a 16 gallon bowfront, with enough filtration to keep a 100 gallon healthy, so I am looking to see maybe a tank mate(s) for him however I don't know if that is possible.
But I am also bouncing around some other ideas for nano monster tanks, the cuttlefish defiantly sound interesting and I will have to look into it.