A "Sea Devil" as depicted by Conrad Gessner in Historia Animalium, 2nd ed, 1604.

Five “Real” Sea Monsters Brought to Life by Early Naturalists

From kraken to mermaids, some monsters are real—if you know how to look for them

A 16th-century illustration of imaginary sea monsters from Cosmographia by Sebastian Mustern, based on creatures from Carta Marina by Olaus Magnus.

Sharks Were Once Called Sea Dogs, And Other Little-Known Facts

Centuries-old illustrations of sharks show just how much we've learned about the fish since our first sightings of them

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