ALT An illustration of an underwater shipwreck surrounded by divers, fish, and an anchor.

ALT Two scuba divers explore an underwater shipwreck.

ALT A collage of all 16 national marine sanctuary system posters.

ALT Illustration showing a Hawaiian monk seal swimming above a coral reef, with fish, sharks, and green turtles. A traditional Polynesian sailing canoe sails at the surface, with an island in the background and a starry night to guide their way. Underwater, shipwrecks and artifacts can also be found.

ALT Illustration of an osprey carrying a striped bass, flying over shipwrecks with grass and trees growing out of them in a river. There is a bald eagle sitting on the words Mallows Bay-Potomac River National Marine Sanctuary. Kayakers, a fisherman, and two people in a canoe are among the wrecks. A beaver swims in the foreground in front of an osprey standing on a nest on top of a shipwreck.

ALT Thunder Bay National Marine Sanctuary commemorative poster, featuring a digital illustration of two divers explorating an underwater shipwreck as the sunsets above the water's surface. Illustration: Tonya Humiston/NOAA

ALT Front of the Wisconsin Shipwreck Coast National Marine Sanctuary poster, featuring digital illustrations of a sunset, a lighthouse, a shipwreck, and people paddling, sailing, and diving in the sanctuary. Illustration by Kathryn Robertson & Tonya Humiston/NOAA

ALT Graphic of all national marine sanctuary commemorative posters released thus far (12).

ALT Graphic illustration of the Olympic Coast National Marine Sanctuary commemorative poster.

ALT Background: water color polka dots in rainbow colors. Foreground text: "Marine Science Thru Art. NOAA Central Library Seminars. Science Communication Through the Arts Seminar Series. Kelly Drinnen, Acting Education Coordinator, Flower Garden Banks National Marine Sanctuary. Join us via webinar Wednesday March 20, 3pm ET"

ALT Graphic illustration of the Stellwagen Bank National Marine Sanctuary poster.