Research into tagging ocean predators, like lemon sharks, has helped scientists better understand coastal ecosystems. Tracking the location of these marine animals has shown top predators returning to safer mangrove ecosystems to give birth. By frequenting these coastal waters, sharks help limit grazing in the sea-grass ecosystem and improve the overall health of the environment.

This video is part of the EARTH A New Wild series that takes a fresh look at humankind’s relationship to the planet’s wildest places and most fascinating species. Produced by National Geographic Studios in association with Passion Planet, the series is hosted by Dr. M. Sanjayan, leading conservation scientist, who takes viewers on a stunning visual journey to explore how humans are inextricably woven into every aspect of the planet’s natural systems.


The series premieres in the U.S. on PBS February 4 at 9 p.m. ET/8 p.m. CT. It premieres internationally on Nat Geo Wild. Check local listings.