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

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

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

The latest "Ask a Marine Biologist" 

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

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

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.

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

Here’s everything you should know about sea turtles, including how long they live, how fast they can swim and where they lay their eggs.