The term "hog sucker" is a colloquialism that refers to a variety of freshwater fish species that suck or graze on the bottom of rivers and lakes. These fish are also sometimes called "sucker" or "suction fish". Although the term has a pejorative connotation, these fish play an important role in their ecosystems by consuming algae, detritus, and other organic matter. Synonyms for hog sucker include "sucker", "catostomus" (which refers to the genus), "sturgeon chub", and "creek fish". In some regions, specific species of hog sucker may have their own regional names, such as the "white sucker" or "longnose sucker".