Slithery fishes are a group of fish that are characterized by their long, slender bodies and smooth skin. Eels are a type of slithery fish that can be found in both saltwater and freshwater habitats. They have a wide range of sizes, from the small European eel to the giant moray eel. Eels are carnivorous predators that feed on smaller fish, crustaceans, and mollusks. They are also known for their ability to survive out of water for extended periods of time.