After sea star wasting disease wiped out more than 90 percent of the ocean's wild sunflower sea star population, divers brave the cold Alaskan waters to find traces of the remaining population.

On a late-night dive in Sitka, Alaska, two divers encounter myriad fascinating creatures, including a giant Pacific octopus on the prowl.

The water may be frigid, but brave the temperatures, and you're rewarded with a smorgasbord of brightly colored critters that dazzle.

Every year, spawning salmon return to the same spot in Alaska as a part of their final act—here's what happens

Despite their frigid water temps, North America's fjords are hotbeds of sea life. Get a taste of the myriad creatures you might encounter when diving Cross and Desolation Sounds.