• About 80 minutes inside, the typical visit, with maps at the exhibits and a free phone guide that needs no download
• Busiest from 11am to 3pm, especially on rainy summer days, so buy tickets online (up to two weeks ahead) to skip the desk line
• No visitor parking: use the paid city spaces along Kościuszko Square, or bus 119 to the Przystań Żeglugi stop opposite

Gdynia Aquarium spreads more than 200 water species over eight halls on five floors, from Amazon tropics and a coral reef to the open Pacific, the Baltic and the cold North Atlantic. The Cold Seas hall, opened in 2024 below sea level in the basement, holds unusual jellyfish and crustaceans.

It is run by the National Marine Fisheries Research Institute, and a free web app guide explains each animal.