Ever wonder what lies beneath the Puget Sound waters? What kind of creatures are swimming right under your feet? Visit one of the most unique attractions in Seattle Southside, the Marine and Science Technology (MaST) Center on Redondo Beach in Des Moines, WA and have all your questions answered and more!

The MaST Center is Highline College’s marine biology and aquarium facility. Not only does it serve as a public learning center, it is also a formal institute for teaching. MaST offers 2,500 square feet of public space and classrooms, laboratories and research areas with state-of-the-art equipment, an aquarium (of course), and even a 38-foot Gray Whale skeleton!

Experience Sea Life in the Pacific Northwest for Free at the MaST Center Touch Tank


















The Aquarium has 15 tanks, including two large touch tanks, which hold a total of about 3,000 gallons of constant flowing seawater.  More than 250 local Puget Sound marine species are displayed.

The MaST Center is open every Saturday from 10 AM to 2 PM and will also be open on Thursdays from 4 PM to 7 PM, during the summer.  And as always, there will be numerous teams ready to tell you about the amazing Puget Sound Sea Life!

MaST Teams include: Marine Mammals, Jelly, and the Live Dive.

Experience Sea Life in the Pacific Northwest for Free at the MaST Center Starfish

















Live Dives occur every 2nd Saturday of the month at 11 AM and 1 PM by an expert diver. The dive lasts approximately 30 minutes, and throughout the whole dive, it is broadcast on large screens on the MaST Center’s pier. This gives people a live, amazing opportunity to see and hear what lies beneath the Puget Sound waters and becomes a virtual scuba diver for a day!

Another great perk to visiting the MaST Center is that it is ALL FREE!

Activities are endless at Redondo Beach! After exploring the MaST Center, enjoy a gourmet lunch at Salty’s Redondo Beach Seafood Grill, and then walk the boardwalk and stroll along the beach. If you are really the adventure type, in the summer, you can rent a kayak or paddleboard from Olympic Outdoor Center right on the beach and cruise the waters.

Enjoy a close excursion from Seattle-Tacoma International Airport today. The MaST Center and Redondo Beach is 8 miles south of the Airport!