Marlins are big business in Mexico's Baja Sur, where local scientists and a dive shop are trying to protect the famed fish by swapping sport fishing for snorkel encounters.

With the sunflower sea star functionally extinct in most of its natural habitit, scientists are working to understand exactly what happend—and how to reverse it.

The duo caught fish to live and chronicled their sustenance through the Japanese art of gyotaku.

Tips for the first-time or return visitors, plus under-the-radar ideas and events for your next trip to these classic dive destinations.

Short on time? Dive with Martin can help plan a fun-packed dive trip (of course, you can always stay longer).

Get your heart beating and blood flowing when you dive any of these high-octane sites from Egypt to French Polynesia.

Here’s how to reivew a dive shop’s website for sustainable action and four sustainable dive shops operating in Cozumel.