High on Mercury
Grouper populations are on the rebound thanks to protection efforts. But a major threat to these fish remains: mercury.
THE OFFICIAL MAGAZINE OF DIVERS ALERT NETWORK
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DAN Member Profile: Jim W. Bunch
DAN member, diver and author Jim W. Bunch talks about discovering and exploring underwaters wrecks on the shores of North Carolina.
Member to Member: A Reef in the Living Room
Aquariums can house your own slice of indoor reef life — complete with colorful fish, corals and spunky crabs. Follow these tips to create your perfect aquarium.
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Oxygen Sensing in Rebreather Diving
Reliable measurement of oxygen is the technology that makes mixed-gas closed-circuit rebreathers (CCRs) possible. The first digital solid-state CCR sensor was made available in Spring 2017, and has greater accuracy and reliability.
Mouths Full of Eggs
Eggs are a dinnertime delicacy in reefs around the world, which means protecting nests is hard work. Ironically, the safest place to hide eggs may be in the mouth.
Flower Garden Banks
Located in the Gulf of Mexico, the Flower Garden Banks National Marine Sanctuary is home to a variety of sea critters and is a treat to dive.
Eating Our Way Out
Lionfish pose a threat to native species as their numbers are skyrocketing out of control. The best way to solve the problem of invasive lionfish? A fork.
Diving After Arthroscopic Knee Surgery
DAN medics and researchers answer your questions about dive medicine.
A Rude Awakening
Although training emphasizes the theoretical aspects of safe freediving, sometimes it takes real-world experience to really make it sink in. Freediving is risky so it is always important to have your skills sharp.
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