Skerry is one of many who work tirelessly for the benefit of our oceans. His activism comes in the form of awe-inspiring photography, such as the image of this leatherback turtle.
There are seven species of sea turtles worldwide, six of which are listed as endangered or critically endangered. Getting to know what they're up to, where and when is a goal of researchers so that we can know what kind of conservation efforts will be most effective.
Check out more photos of leatherback sea turtles in this slideshow, thanks to researcher and photographer Chris Johnson.