''Choromytilus chorus'', common name Chorus mussel or Choro mussel, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of mussel, a marine bivalve mollusc in the family

Mytilidae Mytilidae are a family of small to large marine and brackish-water bivalve molluscs in the order Mytilida. One of the genera, '' Limnoperna'', even inhabits freshwater environments. The order has only this one family which contains some 52 gener ...

.WoRMS
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Description

Shells of ''Choromytilus chorus'' can reach a length of 18 cm (7 inches) and a height of 9 cm (3.5 inches).Allan Hancock Pacific expeditions - Soot-Ryen – The family Mytilidae
Vol. 20 (1955) p. 31

Distribution

This species is present in Peru and in Chile.Discover Life
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References

* Huber, M. (2010). Compendium of bivalves. A full-color guide to 3,300 of the world’s marine bivalves. A status on Bivalvia after 250 years of research. Hackenheim: ConchBooks. 901 pp. * Toro, B.; Navarro, J.M.; Palma-Fleming, H. (2003)
Relationship between bioenergetics responses and organic pollutants in the giant mussel, Choromytilus chorus (Mollusca: Mytilidae)
Aquat. Toxicol. 63(3): 257-269 Mytilidae Molluscs described in 1782 {{Mytilidae-stub