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How deep can hagfishes live in the ocean?
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agnathan
Lamprey (Lampetra) on rainbow trout.
Hagfishes, which are primitive vertebrates classified within the superclass Agnatha, are typically found in cold seawater at depths reaching approximately 1,300 meters (4,260 feet). These hagfishes generally inhabit soft ocean bottoms, where they spend much of their time living in burrows.1