It's nothing new in Nashville, but it's still something to see.
With the home team trailing 2-0 at the start of the third period, a dedicated Nashville fan tried to rally the Predators by throwing a catfish on to the ice.
On the Forecheck's unofficial Predators glossary provides us with a bit of background on the catfish ritual:
Catfish: Nashville's version of Detroit's octopus; catfish will often be tossed to the ice during any given playoff game, and more than likely during games against Detroit (playoff or regular). Could be considered a Rally Catfish.
This wasn't a playoff game, of course, and wasn't against the Red Wings. But someone in the crowd obviously thought this game against the central division rival Chicago Blackhawks was important enough to warrant purchasing, smuggling, and throwing the catfish.
The Blackhawks are currently the hottest team in the league, so it makes sense to bring out every bit of mojo possible when they're beating the heck out of your team. In this case, though, the magical catfish failed to deliver. Chicago scored again in the third period, and went on to win the game 3-0.
Thanks for nothing, you stupid catfish.