When survival is the goal, greater security comes with numbers. Here, we're taking a closer look at schools and shoals—plus, we'll tell you how to capture the best underwater photos.
Marine Life
Ned and Anna DeLoach started the largest fish-sighting database in the world. Working with REEF, the photographers made giant strides protecting coral reef and fish species.
Amazing underwater footage of the Solomon Islands shot with the latest capabilities of high-resolution 4K video by Josh Jensen of Undersea Productions.
Looking for an out-of-the-ordinary shark dive? Here are five you probably haven't heard about but should — plus 15 favorites we just can't get enough of.
What do you know about plankton? They may be the smallest organisms in the ocean, but plankton play an enormous role in the ocean food chain.
Giacomo Palavicini's conservation efforts convinced Honduras to declare a moratorium on shark fishing, making him our July 2015 Sea Hero.
Say hello to these prehistoric sharks — including the infamous Megalodon!