every day
except 23.6.






  • Avoid unnecessary touching of surfaces.
  • You can buy your ticket in advance. If you buy your ticket on site, we recommend a card deposit.
  • The aquarium is marked with a direction of rotation, which we recommend following.

Welcome to the underwater world of Finnish fish at Maretarium!

At the Maretarium you will get to know Finnish aquatic nature. Finland has 187,888 lakes, 25,000 km of rivers and 46,000 km of coastline of the Baltic Sea and its islands. About 60 native and permanent fish species live in Finnish waters. There are dozens of fish species that visit Finland’s sea area occasionally. You probably know perch, eel, pike,  flounder and roach. But do you identify a roach from a rudd, a small whitefish from a vendace or a trout from a salmon? Do you know what kind of fish are gudgeon, chub, minnow or tench?

Latest News

The Dog Month in November

The much-demanded Maretarium Dog Month is approaching. Throughout November, Maretarium also welcomes dog guests to see the fish. The aquarium waters of the Maretarium

Kotka Fish Market 15.-16.10.2022

The Kotka Fish Market will be held in Sapokka around Maretarium and Tulikukko on the 15.-16.10.2022. The market’s theme fish is Baltic herring, and


  • Luontofilmi Itäisen Suomenlahden kansallispuisto, kesto 15 min.

    30.03.2023  11:00 - 11:15

  • Vesiputous kohisee karppialtaalla / Waterfall is running in the entrance hall

    30.03.2023  13:00 - 13:05

  • Kalojen ruokintaa / Feeding of the fish

    30.03.2023  15:00 - 15:15

  • Luontofilmi Saariston soutaja / The Rower of the Islands, kesto 15 min

    30.03.2023  16:00 - 16:15

  • Luontofilmi Itäisen Suomenlahden kansallispuisto, kesto 15 min.

    31.03.2023  11:00 - 11:15

In Maretarium you will meet most of the Finnish fish species. For some species, you may see both as small juveniles and as old adults. The fish in Maretarium live according to the Finnish seasons. At certain times it is possible to see the fish spawnings. February is a spawning time for burbot,  spring for pike, lamprey, ide, bream, perch and vimba bream, summer for three-spined stickleback and pikeperch, autumn for brown trout and Atlantic salmon. There are 22 fish tanks in Maretarium. In addition to fish, you can see e.g. grayfish and in the summer season also frogs.

Ticket prices from these net pages

Free entry
Children under 3 years
Children under 3 years
Free entry

Net Tickets are valid for 1 month from the date of purchase. Annual cards are valid for 12 months.

For groups of more than 15 people, the group leader and bus driver are free of charge.

Note! Various cultural vouchers are NOT accepted by us as a means of payment.

Book a Guided Tour

You can book a guided tour for your group. Please send an email at least one week before to Declare the desired visiting date and size of the group in your mail.

1 – 20 persons, duration 1 hour, 65,00 €/group
21 – 50 persons, duration 1/2 hour, 65,00 €/group.

Our other services

The aquarium tour takes about one hour and fifteen minutes. In the meantime you can pop in at Merisydän Cafe to have some refreshments. After the tour, we recommend a visit to our souvenir shop Meripuoti. Welcome!

A responsible tourist destination

Maretarium operates in accordance with the principles of sustainable tourism and is a responsible tourist destination for the whole family.

Maretarium recommends

Aisti meren läheisyys ja nauti ajasta syöden, juhlien tai yöpyen vain 750 m päässä Maretariumista.

Upeiden näyttelyiden ja tapahtumien myötä pääsee kokemaan uskomattomia tarinoita niin mereltä kuin lähiseudultakin, vain reilun 1 km päässä Maretariumista.

Koe ainutlaatuisessa kohteessa historian havinaa keisarillisella kalastusmajalla, Langinkosken luonnonkauniissa ympäristössä.

Maretariumin song
(in Finnish)
By Maretarium