Tuna

Tuna are warm-blooded and have “mega-gills.” There are many species of tuna and certain species have been listed as endangered. Because of the world’s increasing dependence on this protein source, they could become victims to overfishing.

A yellowfin tuna cruises a kelp paddy on the hunt for baitfish. Divers can encounter tuna in deep, open water, especially near seamounts and pinnacles.

It Came From Inner Space

Technological advancements in autonomous underwater vehicles enable scientists and engineers to test underwater and use the tech toward exploring outer space. The devices can collect samples and send results back to base.

Bill Stone’s latest autonomous underwater vehicle, Sunfish, undergoes tests at Wes Skiles Peacock Springs State Park

Setting an HIRA Standard

The DAN team guides a dive business through the self-assessment process, seeking input to help refine the HIRA program.

Cylinders on a boat and ready for an upcoming dive

Seeing Water From the Sky

Over the past decade, technological advances in unmanned aerial vehicles (UAVs), gimbals and camera/sensor miniaturization have made high-resolution imagery of our world’s dynamic land- and seascapes more accessible than ever. Photographers are able to shoot more frequently and the use of drones enable them to shoot above — capturing a new perspective.

From the sky, these limestone formations look imaginary.

DAN Member Profile: Lee Selisky

Sea Pearls, Inc. specializes in dive weights and has humble beginnings thanks to founder Lee Selisky. Selisky is an avid diver and DAN Member.

Lee Selisky is at home surrounded by old dive memorabilia.

A Rising Tide

Thanks to scholarships, eight landlocked high school students were able to experience the ocean firsthand. Their experiences were part of a web-based series called “A Rising Tide.”

A group of high school students pose with several adults. Mountains are in the background.

Member to Member: The Art of Plastic Pollution

Plastic straws are a problem for the ocean as plastics are not biodegradable. Through a little creativity, one intern took plastic straws and made them into a beautiful sculpture.

An art installation made of plastic pollution, and in the shape of a turtle, rests on the sand

Days of Discovery at Monterey Bay Aquarium

Children with special needs are able to experience the wonders of the ocean thanks to the program Days of Discovery at California’s Monterey Bay Aquarium.

Three young divers pose for a photo

DAN Member Profile: Lloyd Austin

Lloyd Austin spent 30 years teaching research diving classes at UC Berkeley. His focus was on preparing divers for extreme conditions. His career spans nearly 70 years in diver safety and marine science.

DAN member Lloyd Austin photographs a reef fish

Faces of Climate Change

Climate change is adversely affecting polar species. They are most significantly impacted by loss of sea ice, ocean acidification and shifting habitats.

A playful polar bear leaps from ice sheet to ice sheet