Mystery Fish are a species of fish that appear in the Wii video game Wii Play in the game Fishing. They are the rarest of all the fish, and are also pretty difficult to collect. If they are not caught fast enough, they will disappear. They are also the only fish in the game that don't appear every time the game is played. Collecting them awards the player with 250 points -- 500 if they are selected as bonus fish.
Mystery Fish are somewhat long fish, having green, yellow, orange and red on it's body. It also has a long snout, resembling that of an elephant. It has five fins, each with a bluish-gray color to them.