Author

Thomas Gronfeldt

Writer

Thomas started diving during college and has since been diving over most of the world: Australia, Indonesia, Iceland, France, and many other places. He is a NAUI instructor and a commercial diver, and participates in environmental and archeological diving projects around the world.

Stories by Thomas
Dive Guide
New to Scuba Training

The Proper Role of a Dive Guide

The proper role of dive guides is not to keep you safe, but rather to assess the safety and suitability of the dive site and act as a tour guide.

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Scuba Diving
Freediving New to Scuba Training

Scuba Diving, Snorkeling, Skin Diving, Freediving: What’s the Difference?

You have plenty of friends who don’t dive. Here’s how to explain to them the difference between scuba diving, snorkeling, skin diving and freediving.

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Scuba Diving and Old Age
Health In the Water

Scuba Diving and Old Age

Diving is perfectly safe for most of us as we get older, but there are some things to keep in mind when it comes to scuba diving and old age.

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Humpback Whale Congregation
In the Water News

Humpback Whale Congregation Mystery May Be Solved

Scientists may have solved a decades-long mystery of mass humpback congregations taking place off the coast of South Africa

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New stuff
GIYS featured

Get Into Your Sanctuary (Virtually) This Weekend

Get Into Your Sanctuary (Virtually) this weekend with NOAA’s Office of National Marine Sanctuaries.
by Guest Author
giant manta rays in Ecuador

Diving with Giant Manta Rays in Ecuador

Although the Galapagos is by far the country’s most famous dive destination, you can also dive with giant manta rays in Ecuador along the coast.
by Juanita Pienaar
crab species

Crustacean Roundup: Top Five Crab Species

With so many crab species inhabiting the ocean, it’s impossible to highlight all of them. Here are a few facts about five of our favorites.
by Hélène Reynaud
diving in sulawesi

The Best Diving in Sulawesi

The best diving in Sulawesi ranges from walls to reefs to pelagics and macro. With so much to see, here are a few of our choices for must-dives.
by Torben Lonne