The term 'Narrow Fish' can be summarized as a type of EEL, which is a three-letter word. Eels are elongated fish that inhabit both fresh and saltwater environments. They have a slimy skin and lack scales, and they are usually found in shallow waters. Eels are carnivorous and feed on small fish, crustaceans, and other aquatic animals. They are also known for their ability to migrate long distances, often traveling thousands of miles between spawning and feeding grounds.