Jackie Savitz works to protect the world's oceans. A marine biologist, she is passionate that saving the seas will benefit us all.

A leader in the study of the ecology and evolution of marine organisms, Jeremy Jackson is known for his deep understanding of geological time.

Triona McGrath researches how the oceans are changing due to human activities.

Greg Stone was a key driver in the establishment of the Phoenix Island Protected Area in the island nation of Kiribati. The second-largest marine protected area in the world -- and one of the most pristine -- PIPA is a laboratory for exploring and monitoring the recovery of coral reefs from bleaching events.

Sylvia Earle has been at the forefront of ocean exploration for more than four decades. The winner of the 2009 TED Prize, she's a tireless advocate for our oceans.

A world-renowned engineer and inventor, Graham Hawkes wants to revolutionize the way we experience the oceans. He created the Deep Flight series of winged submersibles, which "fly" to the depths of the oceans with the power and elegance of an airplane.

As a water scholar and protector, Kelsey Leonard seeks to establish Indigenous traditions of water conservation as the foundation for international water policy-making.

Carlos M. Duarte researches the effects of climate change on marine ecosystems -- and develops nature-based solutions to mitigate them.

Paul Snelgrove led the group that pulled together the findings of the Census of Marine Life -- synthesizing 10 years and 540 expeditions into a book of wonders.

Brian Skerry is a photojournalist who captures images that not only celebrate the mystery and beauty of the sea but also bring attention to the pressing issue which endanger our oceans.

Fabien Cousteau spent 31 days underwater to research how climate change and pollution are affecting the oceans.

Mike deGruy filmed in and on the ocean for more than three decades -- becoming almost as famous for his storytelling as for his glorious, intimate visions of the sea and the creatures who live in it.

Maria Damanaki is The Nature Conservancy's Global Ambassador for the Ocean, leading the organization's response to the challenges facing marine ecosystems. She co-chairs the UN Community of Ocean Action on Marine and Coastal Ecosystem Management and serves on the Board of the Oxford Martin School’s Program on Sustainable Oceans.

Marah J. Hardt keeps one foot wet in the field while the other wanders the crossroads of science, storytelling and strategy.

Andrew "Twiggy" Forrest is an Australian businessman, philanthropist and entrepreneur, widely considered one of the country’s greatest change agents.

An environmentalist and former minister of the environment, Marcelo Mena is helping Chile make a low emission, resilient and inclusive transition to zero emissions by 2050.

John Delaney leads the team that is building a cabled network of deep-ocean sensors that will study, over time and space, the way the ocean's complex processes interact. By networking the ocean to gather data, he's helping to revolutionize ocean science.

Pushing his body through epic cold-water swims, Lewis Gordon Pugh wants to draw attention to our global climate. He's just back from swimming in a meltwater lake on the slopes of Mount Everest.

Heidi M. Sosik is an ocean scientist who uses tools like lasers and robotic cameras to figure out how tiny organisms in the ocean affect our whole planet.

Barbara Block studies how tuna, billfish and sharks move around (and stay warm) in the open ocean. Knowing how these large predators travel through pelagic waters will help us understand their role in the wider ocean ecosystem.

A conservationist and former diplomat, Susan Ruffo is the senior advisor for Ocean and Climate at United Nations Foundation.

Tierney Thys is a marine biologist and science educator. She studies the behavior of the Mola mola, or giant ocean sunfish -- and works with other scientists to make films that share the wonders they see.

Rob Dunbar looks deeply at ancient corals and sediments to study how the climate and the oceans have shifted over the past 50 to 12,000 years -- and how the Antarctic ecosystem is changing right now.

Dr. Laura Robinson's scientific mission is to document and understand the processes that govern climate.

Stephen Palumbi studies the way humanity and ocean life interact and intertwine. His insights into our codependence offer ideas for protecting both the ocean and ourselves.

Angelicque White investigates changes happening in the ocean through the very smallest lens.

Susan Shaw is an internationally recognized marine toxicologist, author and explorer.

Barton Seaver is an advocate of sustainable seafood and a chef in Washington DC. His work tells the story of our common resources through the communion we all share – dinner.

Alan Jamieson is a scientist and explorer of the deep sea. He specializes in the deepest ecosystems on Earth, known as the Hadal zone, where the ocean extends from 6 km deep to nearly 11 km (3.7 to 6.8 miles deep).

Paul Greenberg researches and writes about fish, aquaculture and the future of the ocean.