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Humans Have Seen Only 0.001 Percent of the World’s Deep Seas, Leaving Most of the Planet a Vast Mystery
Dumbo octopuses, like the Opisthoteuthis agassizii seen here during a 2019 dive, are the deepest-living group of octopuses known. NOAA Office of Ocean Exploration and Research, 2019 Southeastern U.S. Deep-sea Exploration Humans have been exploring the deep …