Choromytilus chorus, commonly known as the Choro mussel or Giant mussel, is a species of mussel, a marine bivalve mollusc in the family Mytilidae.

[1] A particularly large species of mussel, shells of Choromytilus chorus can reach a length of 18 cm (7 inches) and a height of 9 cm (3.5 inches).,[2] one specimen found in April 2024 weighed 816 grams.

[3] This species is present in Peru[2] and in Chile.

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