Exoglossum is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of mound-building freshwater

Freshwater

Fresh water is naturally occurring water on the Earth's surface in ice sheets, ice caps, glaciers, bogs, ponds, lakes, rivers and streams, and underground as groundwater in aquifers and underground streams. Fresh water is generally characterized by having low concentrations of dissolved salts and...

 fish

Fish

Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...

. Members are commonly known as cutlips minnow

Minnow

Minnow is a general term used to refer to small freshwater and saltwater fish, especially those used as bait fish or for fishing bait. More specifically, it refers to small freshwater fish of the carp family.-True minnows:...

s, though the individual species, particularly Exoglossum maxillingua, are also locally known by that name.

Species of this genus usually range from 3 inches to 18 inches when sexually mature. In many areas these minnows are valued as both panfish and baitfish.

Species

• Exoglossum laurae (Carl Hubbs
  Carl Leavitt Hubbs
  -Youth:He was born in Williams, Arizona. He was the son of Charles Leavitt and Elizabeth Hubbs. His father had a wide variety of jobs . The family moved several times before settling in San Diego where he got his first taste of natural history...
  
  , 1931) (Tonguetied minnow)
• Exoglossum maxillingua (Lesueur
  Charles Alexandre Lesueur
  Charles Alexandre Lesueur was a French naturalist, artist and explorer.Pictured here is the oil portrait by Charles Willson Peale of Charles-Alexandre Lesueur...
  
  , 1817) (Cutlips minnow)