National Geographic has published 17 of underwater photographer David Doubilet’s most “jaw-dropping” images as well as an interview in honor of World Oceans Day. Doubilet, widely considered one of the most influential underwater photographers of all time, had his first image published in National Geographic magazine in 1972. It is fitting to choose the images of such a well respected photographer as a window into the ocean on this day.

Here are David Doubilet’s words on how we can help the world’s oceans: “Every day is World Ocean Day. Small changes can make a big difference. Eat sustainable seafood. Recycle and minimize plastic in your world. Become a citizen scientist. And meet the ocean—set a date with the sea.”

Check out the full article with all 17 of the stunning images and full interview here.