The MaST Center Aquarium fosters a culture of marine stewardship by engaging our community through interactive learning, personal relations and exploration.

The MaST Center Aquarium is the marine laboratory for Highline College and is used for Highline and community classes, research, and other activities. The facility has approximately 3,500 gallons of flow-through aquariums and houses over 250 species of marine life from the Salish Sea. The MaST Center Aquarium is open every Saturday to the public during its Discovery Days and hosts over 15,000 visitors annually. During the rest of the week, the MaST Center Aquarium is used for Highline classes, school groups, and other activities that support its mission.

Located in the Redondo neighborhood of Des Moines, WA, the MaST Center Aquarium is about 10 minutes south of the main campus and is halfway between Seattle and Tacoma. It is located on a 270 ft. pier that extends out into Poverty Bay. Redondo is one of the top dive sites in the entire Puget Sound and features one of seven Octopus Protection Areas in the state.