Gdynia Aquarium is a public aquarium and sea museum operated by the National Marine Fisheries Research Institute in Gdynia, Poland. Previously called the Oceanographic Museum and Sea Aquarium of the Sea Fisheries Institute in Gdynia (1971-2003), the aquarium has a zoological garden status and is situated along Aleja John Paul II on the South Pier.
The museum has operated since 21 June 1971, although attempts were made to establish it in the 1920s and 1930s.
Exhibitions presented within the museum are on oceanography and hydrobiology, while the aquarium contains both sea and freshwater flora and fauna.
Educational activities were developed during exhibition modernizations. In 2005, a Cinema-Conference Hall was unveiled, as were rooms equipped with microscopes and computer equipment for conducting laboratory activities. In 2007 a Wet Room was opened - a place where one can put their hands into an open-top aquarium tank and touch fish. The Marine Education Section was expanded with a Preschool Room full of soft marine toys, which is very frequently visited by the youngest school children.