The term 'long, narrow fish' can be described by two crossword solutions: GAR and EEL. GAR is a type of fish that is native to North America and is characterized by its long, slender body. It is also known for its sharp teeth and diamond-shaped scales. EEL is a type of fish that is found in both fresh and salt water. It is characterized by its long, snake-like body and its ability to move quickly through the water. Both GAR and EEL are examples of long, narrow fish.