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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.

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

The International Fisheries Management Body Divers Should Know About

ICCAT helps set sustainable fisheries management quotas for tuna species in the Atlantic Ocean. Here’s what to know and how to get involved.

Sea Cucumbers: Everything There Is to Know

In this edition of “Ask a Marine Biologist,” Dr. David Shiffman discusses one of the ocean’s most likable echinoderm.

Protecting Texas’ Barrier Island Sea Turtles

Sea Turtle, Inc., is on a decades-long mission to protect the South Padre Island turtle population from threats to their nesting grounds and more.

What Remains Unknown About the Deep Sea?

The latest "Ask a Marine Biologist" 

How Scuba Divers Are Helping to Save the Critically Endangered Angel Shark

What organizations do divers need to know about? Dr. David Shiffman features the Angel Shark Project. The Angel Shark Project and Angel Shark Conservation Network use data from scuba divers to understand and protect critically endangered sharks.

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.