Fish often smoked is a term used to describe two types of fish, HADDOCK and EEL. HADDOCK is a type of fish found in the North Atlantic Ocean and is a popular choice for smoking due to its mild flavor and firm texture. EEL is a type of fish found in both fresh and salt water and is also a popular choice for smoking due to its oily flesh and strong flavor. Both HADDOCK and EEL are commonly smoked and used in a variety of dishes.