PADI Underwater Naturalist Specialty Manual

Diving is all about what you see beneath the surface. When you’re immersed in the big blue, you’re in a world filled with fascinating creatures, plants and other-worldly landscapes. Admiring the beauty beneath the waves is one thing, but appreciating how the underwater environment functions, on a more complex level, is something that will enhance your diving experiences in ways you might not expect.

Excerpt from the manual:

"The Naturalist course develops your understanding of underwater ecology"