Riverfood?

Last week at a restaurant, when asked, the owner told us their specialty was fish. One of the people in our group responded by saying that he didn't like seafood that much. The owner adamantly denied the presence of seafood, and with a completely serious face told us that of course it wasn't seafood...it was "riverfood!" Needless to say, we didn't order any seafood or riverfood that night!