Eels are long, snake-like fish that live in both freshwater and saltwater. They have smooth, slimy skin and can be found in rivers, lakes, and oceans around the world. One of the most well-known types is the American eel, which migrates thousands of miles to breed in the Sargasso Sea. Eels are fascinating creatures with unique life cycles, starting as tiny larvae before growing into adult eels. Eels are also popular in various cuisines, especially in Japanese dishes like sushi and unagi (grilled eel). They are rich in nutrients and have a distinct flavor that many people enjoy. However, some eel species are endangered, making conservation efforts important for their survival.