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Fish have ears that are located within the brain cavity. At the same time, they have no external structures such as the human external ear and they have no middle ear. The ears of fishes (and sharks and rays) are very similar in structure to the inner ears found in other vertebrates, including humans. They consist of three semicircular canals and three otolith organs, the saccule, lagena, and utricle. (In reptiles, birds, and mammals, the lagena has evolved into the cochlea).

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15y ago

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