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August 16, 2021: Giant Isopod

This was one of two giant isopods (Bathynomous giganteus) seen while exploring a site about 65 kilometers (40 miles) southeast of Key West, Florida, as part of the 2019 Southeastern U.S. Deep-sea Exploration. The other giant isopod we encountered was observed snacking on a fish head.

These deep-sea scavengers are close relatives of the pill bugs, rolly pollies, and sowbugs found in houses and gardens, but Bathynomus giganteus is much, much larger, growing up to a foot and a half in length. Although giant isopods have been known to exist for more than a century, we still don't know all that much about their biology or behavior, making any observations of them incredibly important (and also really cool).
Credit

Image courtesy of NOAA Ocean Exploration, 2019 Southeastern U.S. Deep-sea Exploration.