Ever wonder why sharks have so many differently shaped teeth or why they keep regrowing throughout their lives? Dr. David Shiffman discusses one of sharks' most iconic—and fascinating—features.

Can sharks be kept at bay without harm? A scientist is testing an electromagnetic barrier off Cape Cod to find out.

Since 2000, the National Lobster Hatchery in Padstow, Cornwall, has championed the European lobster by crafting creative ways to collaborate with locals to implement conservation efforts.

Monterey, California, is home to insatiably curious and playful harbor seals. Here's what it's like when they're zipping around you while on a dive.

Off the coast of Miami, divers are gearing up for a lionfish derby, organized for the first time by Diver’s Paradise, to help protect Florida’s marine ecosystems.

Few divers would give up the chance to swim with the two largest fish in the sea—whale sharks and basking sharks. Here's where to make it happen.

One travel-weary diver finds respite on a weeklong liveaboard trip. On the agenda: snorkeling with humpback whales in Silver Bank, a protected breeding area.

After sea star wasting disease wiped out more than 90 percent of the ocean's wild sunflower sea star population, divers brave the cold Alaskan waters to find traces of the remaining population.

In this edition of “Ask a Marine Biologist,” Dr. David Shiffman discusses a challenging environment for marine life.