Bagel is a bread product originating in the Jewish communities of Poland. It is traditionally shaped by hand into the form of a ring from yeasted wheat dough, roughly hand-sized, that is first boiled for a short time in water and then baked.
Lox is a fillet of brined salmon. Lox is often served on a bagel with cream cheese, and is usually garnished with tomato, sliced red onion, and sometimes capers.
The word Lox stems from the Yiddish word for salmon, “laks.” Lox is thinly sliced salmon fillet, usually the belly, and cured in a salty brine (true lox is never smoked). Lox’s gets its origin from Scandinavia, where fishermen mastered the art of preserving salmon in saltwater brine.