The Gdynia Aquarium (Akwarium Gdyńskie) is home to more than thousand marine and terrestrial animals, and provides an amazing impression of the life in the world's seas and oceans. Some of its newest guests include the North Pacific Giant Octupos, the Zebra Shark and the Dwarf Crocodile.
http://www.visitpomerania.eu/cities/gdynia/attractions/gdynia-aquarium/