Living Seas, the largest capital improvement since the aquarium was built in 1992, will debut next summer. It has been designed to inspire a love of nature, a sense of place and ocean optimism, a statement from the aquarium said. (File photo courtesy Birch Aquarium)

It opened with a “kelp cutting.

Birch Aquarium at Scripps Institution of Oceanography at UC San Diego unveiled its newest exhibition on Thursday: The largest capital project in the aquarium’s history.

The $18.7 million Adam R. Scripps Living Seas Gallery, which is now officially open to the public, features 38 separate habitats, including a 3,500-gallon giant Pacific octopus habitat, an “under-the-pier” experience that allows guests a view beneath Scripps Pier, and a 6,400-gallon tropical coral habitat that is more than four times the size of the previous one.

The exhibition replaces the Hall of Fishes, which saw over 12 million guests during its 30-year run.

Under construction since last August, the reimagined Living Seas exhibition also features “state-of-the-art” pumps and cooling systems, digital projections, UV-responsive wallpaper and “an ability to seamlessly shift” from day to nighttime events, “highlighting some of the exciting things that happen in the ocean after dark.”

The exhibition launch was celebrated Wednesday with a “kelp cutting” ceremony attended by Birch Aquarium Executive Director Harry Helling, UC San Diego Chancellor Pradeep Khosla, Vice Chancellor for Marine Sciences and Director of Scripps Institution of Oceanography Margaret Leinen, and San Diego City Council President Joe LaCava.

“The Scripps family’s legacy is deeply woven into the story of Birch Aquarium,” Helling said in a statement. “We are honored to continue to benefit from their vision, wisdom and generosity as we embark on this exciting new chapter.”

Admission to Living Seas is included with the cost of aquarium admission. Information on hours of operation and more can be found here.