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.

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

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.

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

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?

Many dream of being a marine biologist when they grow up, but what job opportunities are available to one graduating with a degree in marine biology? Expert David Shiffman, Ph.D. shares in his latest edition of “Ask a Marine Biologist.”

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.