Watermarks, the National Aquarium's official bi-annual member magazine, gives readers a look behind the scenes at the animals, experts and programs that power the Aquarium's mission to connect people with nature to inspire compassion and care for our ocean planet. Members look to Watermarks for a deep-dive into the species and projects that make the National Aquarium such a special place, and an insider's perspective on the initiatives and developments that will propel it into the future.
Check out feature stories from past issues here!
Most Recent Spring 2025
Read about a longstanding but little-known partnership between the National Aquarium and Johns Hopkins University, get to know some Aquarium species that hold special places in our staff members' hearts, learn ways to differentiate between certain stripey springtime pollinators, and much more.
Past Issue Fall 2024
Hear about Harriet Tubman's legacy and skills as a naturalist, the evolution of sloth care at the Aquarium, the making of our new mural, General Curator Jack Cover's life and career, 17 Henry Hall Summer Scholars' experience on an Alabama barrier island, and more.
Past Issue Summer 2024
Peek into this issue to explore how we care for National Aquarium animals throughout their lives, why algae deserve our appreciation, where the Gwynns Falls begins and ends, and how the new National Aquarium Harbor Wetland presented by CFG Bank is shaping up ahead of its opening this summer!
Past Issue Winter 2024
Stay close to home with stories and videos about Baltimore's Inner Harbor and how we care for Aquarium animals' teeth, beaks and bills—and then follow us to the literal end of the Earth, to Antarctica.
Past Issue Summer 2023
Travel along the country's largest estuary, get a new perspective on our Dolphin Discovery exhibit, visit a well-loved patch of Baltimore City forest and follow one sea turtle's journey to the National Aquarium.