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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 Can Divers Do to Help With Ocean Plastic Pollution?

In this edition of “Ask a Marine Biologist,” Dr. David Shiffman shares what individuals can do to help fight the scourge of ocean pollution.

Minorities in Shark Sciences Makes Marine Biology and Conservation Accessible to All

This month's organizations divers should know highlights Minorities in Shark Sciences. MISS provides community and professional development opportunities and internships to people historically excluded from ocean science.

Tuna, Mercury and Bioaccumulation: Have Humans Made it Worse?

In this edition of “Ask a Marine Biologist,” Dr. David Shiffman explains the health reasons behind limiting how much apex predator you eat.

The Shark, Billfish and Tuna Organization All Divers Should Know About

Dr. David Shiffman shares his "organizations divers should know about" pick of the month featuring NOAA Highly Migratory Species Division.

Do Sharks Behave Differently at Night?

Latest Ask a Marine Biologist

Organizations Divers Should Know: The International Seabed Authority

Learn about the United Nations body that controls deep sea mining

Does Flash Photography Hurt Marine Life?

Photographs of marine animals can educate and inspire. In this edition of “Ask a Marine Biologist,” Dr. David Shiffman discusses whether taking those photos hurt the animals.

How Common Are Stranded Sharks Like the Frozen One in Cape Cod?

In this edition of Ask a Marine Biologist, Dr. David Shiffman answers questions recently sparked by a frozen shark found in Cape Cod.

Are Sharks Mammals? (No!)

In this edition of Ask a Marine Biologist, Dr. David Shiffman answers one of the most-asked questions about sharks—are they mammals, fish, or something else?