shark moonlight

(Photo by GEORGE DESIPRIS from Pexels)

BATON ROUGE, La. — Strange things seem to always happen when there’s a full moon. A new study finds you might be able to add shark attacks to that list! Researchers from LSU and the University of Florida have found a surprising link between moon phases and the chances of sharks attacking people in the ocean.

In a review of 55 years of shark attack records, the team found the number of attacks goes up during periods of higher lunar illumination and go down when there’s less illumination. Simply put, there are more shark attacks when the Moon is full or close to it.

Researchers say the reason for this is still unclear, but it’s not because sharks are stalking more people out for a moonlight swim. Their findings point to the Moon’s gravitational impact on the oceans and all life on Earth playing a much bigger role in this change in behavior.

“It’s not a matter of more light at night for sharks to see. Most shark attacks occur in the daylight. However, the moon can exert other forces on Earth and its oceans in ways that are much more subtle—for example, the gravitation pull that we see affect the tides,” says LSU associate professor and study researcher Steve Midway in a university release.

While study authors believe it’s too early to definitively say that the amount of moonlight can predict shark attack frequency, the data can help officials make better water safety recommendations in the future.

“The abundance of data we have would suggest that there is something there that’s worth continuing to look at,” Midway concludes.

The findings are published in the journal Frontiers in Marine Science.

About Chris Melore

Chris Melore has been a writer, researcher, editor, and producer in the New York-area since 2006. He won a local Emmy award for his work in sports television in 2011.

Our Editorial Process

StudyFinds publishes digestible, agenda-free, transparent research summaries that are intended to inform the reader as well as stir civil, educated debate. We do not agree nor disagree with any of the studies we post, rather, we encourage our readers to debate the veracity of the findings themselves. All articles published on StudyFinds are vetted by our editors prior to publication and include links back to the source or corresponding journal article, if possible.

Our Editorial Team

Steve Fink


Chris Melore


Sophia Naughton

Associate Editor