''Characidium'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of freshawater

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Crenuchidae, the South American darters. The fishes in theis genus are mainly found in South America, but ''C. marshi'' is from

Panama Panama, officially the Republic of Panama, is a country in Latin America at the southern end of Central America, bordering South America. It is bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north, and ...

. They are small (less than long), slender fish that live on the bottom in flowing fresh waters and feed on small animals such as insects.Lujan, N.K., Agudelo-Zamora, H., Taphorn, D.C., Booth, P.N. & López-Fernández, H. (2013)
Description of a New, Narrowly Endemic South American Darter (Characiformes: Crenuchidae) from the Central Guiana Shield Highlands of Guyana.
''Copeia, 2013 (3): 454-463.''

Species

''Characidium'' contains the following recognized species:

References

{{Taxonbar, from=Q3762928 Characiformes genera Freshwater fish genera Taxa named by Johannes Theodor Reinhardt Characidiinae