Clupea is a genus of small, silvery fish that are commonly found in the world's oceans and estuaries. There are several synonyms for the word "clupea" that are used interchangeably depending on the region and language. In English, clupea is often referred to as the Atlantic herring or the European sprat. Other synonyms include the sardine, anchovy, and pilchard. In Spanish, it is known as the arenque or the arenque blanco, while in French, it is called the hareng. Despite the different names, these fish are all part of the same family and are an important source of food for both humans and marine life.