The Maritime Aquarium at Norwalk (formerly Maritime Center) is an aquarium located in the South Norwalk (or "SoNo") section of Norwalk, Connecticut.
The Maritime Aquarium at Norwalk is the only aquarium devoted to Long Island Sound, the "Estuary of National Significance" just outside our doors. Its marine population includes a variety of sharks, stingrays, harbor seals, sea turtles, otters, jellies, crabs, lobsters, and more. The Maritime Aquarium at Norwalk also exhibits tropical travelers that follow the Gulf Stream north to Long Island Sound. Plus, it has some other fun animals, from tamarins to meerkats. The Maritime Aquarium at Norwalk offers lots of touch experiences, including sturgeon, stingrays, sharks, jellyfish, and intertidal animals.
In addition to its exhibits, The Maritime Aquarium at Norwalk offers educational programs, year-round cruises, birthday parties, sleepovers, summer camps and special events.
The Maritime Aquarium's mission is to ignite a connection to Long Island Sound and the ocean to enrich the lives of all people and inspire action to protect our blue planet.
The Maritime Aquarium at Norwalk is one of Connecticut's top tourist attractions. Annual attendance averages 500,000 visitors. The Maritime Aquarium's estimated statewide economic impact is approximately $89 million; it contributes approximately $56 million to Norwalk's economy annually.
The "Maritime Center" opened July 16, 1988. The name was changed to the "Maritime Aquarium" in July 1996 to emphasize the live animals featured there.
It first opened by renovating a former 1860s iron works factory into an IMAX theater. Visitors, as they walk past the Ray Touch Pool toward the Marine Lab, still tread on the original wood floors (under original wood beams) of the iron works. Occupying approximately 100,000 gross square feet, the first animal exhibits included harbor seals, Open Ocean and Touch Tank.
The cultural section of the aquarium originally explored boat building and human exploration of the sea, but the boatbuilding activities were eliminated in early 2007. In the final seven years of its 19-year run, the boatbuilding program constructed about 500 boats, and 20,000 children took part in classes that created more than 5,000 model boats, but aquarium officials said the shop only served three to five percent of patrons.
The boatbuilding shop was replaced with a new Marine Lab, with baby seahorses, jellyfish, and other new animals, as well as information on aquaculture, sustainable seafood, and responsible home aquarium keeping.
In recent years, the Maritime Aquarium has emphasized helping visitors understand the ecology of Long Island Sound and its watershed. The aquarium participates in and directs local scientific research on Long Island Sound's animal residents, including a counting and tagging program for horseshoe crabs. The Maritime Aquarium also helped create the Long Island Sound Biodiversity Database, which is open to the public.
In February 2021, the aquarium replaced its now-closed IMAX theatre with a new 4D movie theatre.
The Maritime Aquarium is approximately and features more than 177,000 gallons of water in its live-animal exhibits. On exhibit are more than 2,700 animals representing more than 300 species.
As of 2026, exhibits include Pinniped Cove, Just Add Water, Journey with Jellies, Life Among the Grasses, Meerkats!, Jiggle-a-Jelly, Shark and Ray Touch Pool, among others.