Warning: count(): Parameter must be an array or an object that implements Countable in /home/customer/www/sharkstewards.org/public_html/wp-content/plugins/wp-popups-lite/src/includes/class-rules.php on line 1070

Sharktober: Why We Need Great White Sharks

“Sharktober – Celebrating Sharks: Why We Need Them, Why We Need to Protect Them”

  • Tuesday, September 28, 2021
  • 7:00 PM  8:30 PM

On September 28, 2021, the ACS San Francisco Bay chapter was honored to host an exciting presentation by David McGuire, Founder and Director of Shark Stewards, National Geographic Explorer, and Emmy award-winning filmmaker. Mr. McGuire provided a fascinating overview of what is known about the variety of shark species in the San Francisco Bay Area and the region stretching from the Farallons to Monterey. He described his past and present research, and his tireless work to protect sharks and their habitats around the world. Mr. McGuire also offered recommendations for how we all can contribute to the protection of sharks and ocean ecosystems.

Sharks are an apex species, critical to the health of ocean ecosystems, yet shark populations are under relentless pressure. An estimated 73,000,000 – 100,000,000 sharks are killed for their fins each year. There is much to be done and each of us can play a role. Get ready to learn and discover a new or deeper fascination with sharks!

This webinar is offered for free to the public. A suggested donation of $10 per participant/viewer is encouraged and appreciated. Donations help cover webinar costs and support our education and cetacean research grant programs. Click here to donate.



A marine biologist and shark advocate, David McGuire is the founder of the Ocean Health and Shark Conservation nonprofit Shark Stewards dedicated to saving sharks and protecting critical marine habitat. As a sailing captain, divemaster, and filmmaker, David has explored the world ocean on numerous sailing voyages producing media with an emphasis on sharks and ocean awareness.

David’s undergraduate work in Marine Biology at UC Santa Barbara led him to study whales in Mexico, and join an expedition across the Pacific. He has a master’s degree in environmental health from UC Berkeley, where he worked for over a decade in the Department of Integrative Biology. A Research Associate of the Department of Aquatic Biology at the California Academy of Sciences, David is conducting a shark research program that includes shark population studies, movements, and fisheries impacts. An adjunct professor at the University of San Francisco, David teaches marine protection policy and marine ecology.

He has participated in numerous sailing voyages and scientific diving expeditions with Academy researchers communicating the wonders of the natural world and ocean life and the need to protect them, including a two-month biodiversity expedition to the Philippines where he filmed and produced an Emmy award-winning documentary Reef to Rainforests.

David is the writer, producer, and underwater cinematographer of several award-winning documentaries focusing on sharks, including an online series in Borneo. A National Geographic Explorer, he has also published numerous articles on the state of the ocean and sharks. He writes a National Geographic Explorers blog and an Ocean Voices column on sharks and ocean health.

David selects and emcees films and hosts panels at film festivals including the San Francisco Ocean Film Festival and the San Francisco Green Film Festival and is a popular public speaker sharing his ocean stories and images.

He has received numerous awards for his work including an award for Journalism with KQED for the investigative story Sea Horse Sleuth, the 2011 Hero of Marin Environmental Stewardship Award, and an Emmy award for his work on the documentary Reefs to Rainforests. David has been recognized by Congressman Jared Huffman for his work and was awarded the Hero of Marine Award for catalyzing shark fin trade bans in North America. He has also been recognized as a Hero of the Environment by the Town of Pacifica for his educational and ocean conservation work.

An ocean adventurer and athlete, David has competed in numerous endurance events such as the Trans Pacific Yacht Race, Hawaii Ironman and is an open water marathon swimmer, swimming for sharks. Current projects include an adventure film on diving with sharks in Malaysia and a book on sharks and rays of the San Francisco Bay.

Scuba Diver Watches White Tip Reef Sharks, photo by Shark Stewards
Adult White Sharks, North East Pacific Population, Photo by David McGuire
Blue Shark, photo by Shark Stewards
Scalloped Hammerhead Shark Finned Alive and Thrown Overboard to Drown, Photo by Shark Stewards
David McGuire