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giant isopod
Bathynomus giganteus
An isopod is any member of the order Isopoda. Isopods are segmented crustaceans, the best known of which are woodlice, pill bugs, sow bugs, and other land-dwelling species. In caves, aquatic isopods are often studied because many are troglobitic and depend on caves for survival. Most isopods are small; however, there are about nine species of so-called giant isopods in the genus Bathynomus.

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