These April Fools’ Day marine pranksters mimic, hide and otherwise disguise themselves on April 1 and every day of the year.

During a 2022 Titanic Expedition, researchers made a thrilling discovery near the infamous wreck: a never-before-seen deep-ocean rocky reef.

Groupers have been a favorite fish since the pioneering days of diving. Widespread in the tropics and subtropics, they are slow-moving, curious and intelligent, and many are highly colored. Their big eyes and rubbery lips give them a cartoonish charisma. Groupers are long-lived and can become so infatuated with divers that they follow them closely— much to the enjoyment of any shooter. Such big personalities deserve the best photographic treatment.

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

Dive with vivacious sea lions and other flora and fauna at this popular dive site in magical Monterey, California. Despite its remote location and challenging conditions, local divers say it is a rewarding experience.

Underwater photographer Patrick Webster encourages viewers to take a closer look at creatures while diving or even in their favorite photos.

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?

Orca moms “baby” their adult sons and continue to hunt for them well into adulthood – a move that could harm endangered populations in terms of new births, research shows.

Underwater photographer, Kate Jonker's, 15-year-long search for the dugong, ended in success in the Red Sea. Read more about her incredible experience with this marine mammal.