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 European eel, which migrates thousands of miles to breed in the Sargasso Sea. Eels are fascinating creatures that can be quite elusive, often hiding in mud or under rocks. Eels are also popular in various cuisines, especially in Japanese dishes like sushi and unagi, which is grilled eel served over rice. They are rich in nutrients and have a unique flavor that many people enjoy. Despite their popularity, eels face threats from overfishing and habitat loss, making their conservation important.