Depends. Are you looking to get said Sausage Cat because you genuinely -like- and can appreciate a fish that does not swim actively much, and is very sensitive (I have spoken with someone who once owned one of these cats, and he mentioned a time when he and his wife were fighting in the room the tank was in, and the cat would not stop shocking until they left the area. The fish had no tankmates to shock, but apparently reacted to the fight outside the glass.)?
Or...do you want a trophy fish? I talk with many people who say that they would love to own piranha, cause, like, you know, they're so nasty and can eat bones up and can eat cows whole and they're really k00l!!!!1111
If the reason is the latter, no. IF, and this is a huge IF, you have the tank needed for such an animal, and can live with devoting a very large tank to a sole catfish that tends to lay in one spot and not be very active, for years and years and years....then perhaps. I would buy a red tailed cat, house it successfully for years, and -then- move onto the more shocking fish. Pun intended.