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David Shiffman, Ph.D.

Dr. David Shiffman is a marine conservation biologist who studies threatened sharks and how to protect them.

What Are the Best Schools to Study Marine Biology?

In this edition of “Ask a Marine Biologist,” Dr. David Shiffman gives aspiring marine scientists things to consider when looking for in a college or university.

The Newest Marine Sanctuary Beckons Wreck Divers to Explore the Great Lakes

Lake Ontario National Marine Sanctuary, designated this summer, offers cultural and historical diving gems.

Why Do Sea Turtles Return to the Same Beach?

In this edition of “Ask a Marine Biologist,” Dr. David Shiffman answers a question about sea turtle natal homing.

On a Mission to Preserve the Arctic

As industrial-scale fishing and shipping ventures make their way into the Arctic, one group is working to keep this secluded region as pristine as possible.

Do Dive Lights Harm Manta Rays?

Shining bright plankton-attracting lights is a common practice to lure giant manta rays for nighttime viewings, but can the seemingly harmless spectacle actually harm these gentle giants?

How Captive Breeding is Helping Shark Conservation

The organization ReShark works to help threatened shark populations bounce back in a unique way.

This Organization Wants to Make Diving More Eco-Friendly

There's no question that most scuba divers share a deep-rooted love with the ocean. But are divers taking as many precautions as possible to protect the ecosystem they adore? This organization provides above-and-beyond training to help divers become as sustainable as possible.

Ask a Marine Biologist: Why Are Polar Ocean Animals Giant?

In this edition of “Ask a Marine Biologist,” David Shiffman discusses polar gigantism.

Can Fish Survive in Both Fresh and Salt Water?

In this edition of “Ask a Marine Biologist,” Dr. David Shiffman discusses osmoregulation and whether fish can adapt to different environmental conditions