Spy on your favorite Tiger, Hammerhead, and Bull sharks in our custom-designed Google Earth interactive map.


Tracking Marian

Species: Great Hammerhead
Scientific Name: Sphyrna mokarran
Date Tagged: January 29, 2011
Location Tagged: Outer Reef, Florida Keys
Gender: Female
Total Length (TL): 287cm

About Marian

The Story Behind the Name: This magnificent creature was named in honor of Marian Dunlap, the founding donor of the Shark Research & Conservation Program. After her husband passed away, Marian continued fulfilling his dreams of a healthy and rich natural environment by providing Dr. Neil Hammerschlag with the resources necessary to expand his marine conservation efforts into an interdisciplinary and educational program. Her foresight has impacted the lives of thousands of students as well as laid a foundation for more effective marine conservation policy. We hope she enjoys following her Great Hammerhead online.

Satellite Tagging: Marian was carefully tagged with the latest in satellite tag technology providing us with the first opportunity to follow the long term movements of these threatened species. Please keep checking back frequently to follow Marian’s movements, which will be updated every few days as his satellite tag continues to send us real-time tracking data.

Adopt-a-Shark: For information on how you can contribute to our shark conservation research by adopting and tracking your own shark, please visit our Adopt a Shark page.

System Requirements

Google Maps renders in all modern browsers and mobile operating systems. For more details visit Google’s map support page to view detailed system requirements.


To animate our interactive shark tracking, play with the time slider tool in the map upper-left. Simply, go to the slider & separate the bottom left & right tabs by ~1/4”. Then click on the leading tab & drag it across the slider; or click play to automatically view tracks.