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Credit: NOAA - Gray's Reef National Marine Sanctuary
Gray's Reef National Marine Sanctuary, about 17 miles off Sapelo Island, Georgia, is home to a variety of strange creatures. The Glyceridae, or bloodworms, are ferocious epi- and infaunal polychaetes that prey upon small invertebrates. They are errant burrowers that build galleries of interconnected tubes to aid in catching their prey.