Nudibranchs may look beautiful and delicate, but these sea slugs have some of the ocean's best defenses, making them worthy adversaries against would-be predators.
Sitting in just 30 feet of water off Panther Point in British Columbia, the Panther is a nearly 200-year-old three-masted clipper wreck teeming with marine life.
West Greenland is where letters to Santa wind up every year, but it's not in some workshop where you'll find the magic. The real gifts are below the water's surface.
There's much more to the relationship between an anemonefish and a giant sea anemone than a sense of camaraderie. Here's how they keep each other alive.