In the main building of the Kaliningrad World ocean museum the exposition «The World of Ocean. A Touch» is located. In the bigger hall one can see the skeleton of a Baltic cachalot, a giant squid and some other species of ocean fauna. The models of two bathyscaphes (Thetys and Mir) used for ocean researches are at the museum.

There are about two dozens of aquariums in a separate room. There one can see sea fishes from different parts of earth. Also the museum has a large collection of various corals.

A viewing platform is on the top of the building where a lighthouse with a Fresnel lens is located. From there one can have a wonderful view of the river and the main cathedral.