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  • About
    • Mission and Vision
    • Our Goals and How We Get There
    • Where We Work
      • Saving the Scalloped Hammerheads of Baja
      • California Marine Protection
      • Hawai’i Kahu Manō- Guardians of the Shark
        • Respect for Hawaii Fish- Aquarium Collection
        • ‘Auamakua, Hawaii’s Spiritual Connection to the Shark
      • Sharks in the Coral Triangle
        • Indonesia Protecting Sharks and Reefs
        • Creating a Marine Protected Area in Indonesia
    • Our Team
      • Media Kit, David McGuire, Shark Stewards
    • Partners & Donors
    • Victories & Milestones
      • WE DID IT! Saving Endangered Sharks at CITES 2022
      • US Shark Fin Sales Elimination Act Signed into Law
      • Law to End Lethal California Driftnet Fishery Passes
      • Support the Papahānaumokuākea National Marine Sanctuary Designation
    • Shark Stewards DEI Statement
    • Statement Against Asian and API Hate
  • Our Work
    • Saving Sharks
    • California Marine Protected Area Network
    • Sustainable Ecotourism and Data Dives
    • Citizen Science
    • Media Production
  • Science & Education
    • Aquatic Park Stewardship
    • Community Science
    • Shark Watch California
      • Sharktober Sanctuary Wildlife Expeditions
        • Sharktober: Farallon Sanctuary and Wildlife Tours
        • Sharktober Sanctuary Tours- Instructions
      • Observe and Record Sevengill Sharks
      • Sharks of the San Francisco Bay
      • Shark ID and MPAs Education Adventure
    • Inland Ocean Academy
    • Shark Science Sheets
      • CITES Shark Science Sheets
    • Sharks of Hawaii
    • Shark Sanctuary and MPAs
    • White Shark Stewardship
      • How to Avoid a White Shark Attack
      • Sharktober- White Shark Awareness
  • Campaigns
    • Stop the Ocean Steal
    • Act Now to Defend the Endangered Species Act
    • Save the Endangered Species Act
      • PETITION TO DEFEND THE ENDANGERED SPECIES ACT
    • SHARKED Act in Senate Committee- Act Now
    • Defend Pacific Marine National Monuments From Commercial Fishing
    • Support NOAA and our National Marine Sanctuaries
    • Urgent Action to Save Oceanic Whitetip Sharks
    • Stop Big Plastic From Polluting Oceans
  • Get Involved
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Do Sharks Speak?

Swell shark and case

Sharks are often called the Silent Killer, but are they really silent? Communication can include many senses, and sharks have senses that few other species possess. Sharks have evolved as […]

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Posted byDavid McGuireJanuary 31, 2025January 31, 2025Tags: bull sharks, hammerhead sharks, predators, reef sharks, science, shark attack, shark communication, sharks

SHARKED Act Reintroduced and Passes Through House- Add Your Comments

Jan 30, 2025 “As a lifelong fisherman, I have seen firsthand the impact of shark depredation on our marine ecosystem and the sportfishing community,” said Congressman Wittman (R,VA).  This point […]

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Posted byDavid McGuireJanuary 30, 2025June 29, 2025

Why I Will Not Eat Shark Fin Soup This Lunar New Year

Snale and bowl of shark fin soup

01/29/2024 Guest Essay by Volunteer Hana Lin As a Singaporean high school student of Chinese descent, Lunar New Year is one of my favorite times of the year. It is […]

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Posted byDavid McGuireJanuary 29, 2025January 31, 2025

The History of US Shark Finning and Fin Trade Regulation

Shark Fins Drying in a Market

Since the 1950s industrial fishing pressure has increased 18 times. Many populations of pelagic fish like swordfish and tuna have declined severely and sharks have suffered most. Scientists estimate that […]

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Posted byDavid McGuireJanuary 21, 2025January 28, 2025Tags: CITES, IUU Fishing, shark fin bans, shark fin sales, Shark fin soup, shark fin trade, sharkfin trade

Hope for Sharks and Marine Habitat

Karina Small

Shark Newsletter December 24, 2024 View this email in your browser This year, as part of our Kahu Manō campaign to reduce retention and bycatch of critically endangered sharks, Shark […]

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Posted byDavid McGuireJanuary 17, 2025January 17, 2025Tags: annual report, Conservation, end of year, hawaii, oceanic whitetip sharks, overfishing, Pacific, sharks, Tuna, volunteers

Dead Sharks and Rays in Aquatic Park

Dead male leopard shark

During the week of February 6 a colleague reported via Reddit seeing several dead bat rays and leopard sharks at Berkeley’s Aquatic Park. After investigating, a biologist from Shark Stewards recorded nearly 20 dead leopard sharks and bat rays at Aquatic Park.

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Posted byDavid McGuireJanuary 13, 2025January 27, 2025Tags: aquatic park, Bat ray, Berkeley, leopard shark, San Francisco Bay, sharks, stranding

Shark Sex- How Sharks Do It

Swell shark and case

Shark sex- How sharks reproduce- a diversity of strategies from asexual to eggs to sexual reproduction. Sharks are amazing!

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Posted byDavid McGuireJanuary 3, 2025February 3, 2025Tags: biology, great white shark, sex, sexuality, sharks

Hosting a Plastic Free Event

Malaysia Plastic Harbor 2 300x200

For pot-luck, encourage guests to avoid plastic to go containers, and bring reusable containers and take containers home with them for cleaning, disposal or recycling. Here are some tips for event hosts for a plastic free event.

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Posted byDavid McGuireJanuary 1, 2025January 22, 2025Tags: California, coca cola, plastic, pollution, single use, solo no, surfrider

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Act Now

  • Support Increasing International Protection for Endangered Sharks at CITES CoP20

    As a U.S. nongovernmental organization Shark Stewards will attend CoP20 as a participant advancing the Oceanic Whitetip shark, Whale shark and Gulper Sharks. In addition we will be advancing the …

  • House Votes to Pass Shark Fin Trade Ban

    A bill to end the USA shark fin trade reintroduced by Representatives Sablan and McCaul passed through the Congress with a strong bipartisan majority Thursday. House lawmakers passed the measure …

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  • About
    • Mission and Vision
    • Our Goals and How We Get There
    • Where We Work
      • Saving the Scalloped Hammerheads of Baja
      • California Marine Protection
      • Hawai’i Kahu Manō- Guardians of the Shark
        • Respect for Hawaii Fish- Aquarium Collection
        • ‘Auamakua, Hawaii’s Spiritual Connection to the Shark
      • Sharks in the Coral Triangle
        • Indonesia Protecting Sharks and Reefs
        • Creating a Marine Protected Area in Indonesia
    • Our Team
      • Media Kit, David McGuire, Shark Stewards
    • Partners & Donors
    • Victories & Milestones
      • WE DID IT! Saving Endangered Sharks at CITES 2022
      • US Shark Fin Sales Elimination Act Signed into Law
      • Law to End Lethal California Driftnet Fishery Passes
      • Support the Papahānaumokuākea National Marine Sanctuary Designation
    • Shark Stewards DEI Statement
    • Statement Against Asian and API Hate
  • Our Work
    • Saving Sharks
    • California Marine Protected Area Network
    • Sustainable Ecotourism and Data Dives
    • Citizen Science
    • Media Production
  • Science & Education
    • Aquatic Park Stewardship
    • Community Science
    • Shark Watch California
      • Sharktober Sanctuary Wildlife Expeditions
        • Sharktober: Farallon Sanctuary and Wildlife Tours
        • Sharktober Sanctuary Tours- Instructions
      • Observe and Record Sevengill Sharks
      • Sharks of the San Francisco Bay
      • Shark ID and MPAs Education Adventure
    • Inland Ocean Academy
    • Shark Science Sheets
      • CITES Shark Science Sheets
    • Sharks of Hawaii
    • Shark Sanctuary and MPAs
    • White Shark Stewardship
      • How to Avoid a White Shark Attack
      • Sharktober- White Shark Awareness
  • Campaigns
    • Stop the Ocean Steal
    • Act Now to Defend the Endangered Species Act
    • Save the Endangered Species Act
      • PETITION TO DEFEND THE ENDANGERED SPECIES ACT
    • SHARKED Act in Senate Committee- Act Now
    • Defend Pacific Marine National Monuments From Commercial Fishing
    • Support NOAA and our National Marine Sanctuaries
    • Urgent Action to Save Oceanic Whitetip Sharks
    • Stop Big Plastic From Polluting Oceans
  • Get Involved
    • Contact Us
    • Shark Buddies- Connect and Protect
    • Adventures
    • Help Us Save Sharks
    • Beach Cleanups and Surveys
    • Events
  • Shark News
  • Shop

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2150 Allston Way, Suite 460
Berkeley, CA 94704

Shark Stewards is a project of The Earth Island Institute, an environmentalist think tank founded by David Brower in 1983 and a 501(c)(3) non-profit.

Our media partner is Scubazoo, who we thank for their generous support and donation of images.