Early one morning in 1948, a phone call woke up the police chief in the small town of Clearwater, Florida. The caller said he’d seen something strange at the beach. Residents woke up that morning to find an odd set of footprints in the sand, and a rumor began circulating that Clearwater Beach had a sea monster. The rumor spread so wide, it caught the attention of a biologist in New York named Ivan Sanderson. Ivan Sanderson coined the term cryptozoology in the 1930s, meaning the search for creatures that haven’t been found and aren’t recognized by science—like the Loch Ness monster or Bigfoot. But even Ivan Sanderson couldn’t figure out where, or what, the footprints were coming from. We speak with Jeff Klinkenberg, Richard Grigonis, Jeff Signorini, and Alyssa Shimko about Tony Signorini, Al Williams, and the Clearwater monster.

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