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Naturum Kosterhavet

Photographer: Jonas Ingman

Fun for children

Strömstad and the nationalpark offer lots of fun activities for children of all ages. Fish for crabs, cycle on the Koster Islands, go on a seal safari, or visit popular attractions such as naturum Kosterhavet and the Tjärnö Aquarium, where you can learn more about life beneath the surface.


Photographer: Jonas Ingman

  • The Naturum visitor centre is a stone’s throw from the Ekenäs jetty on South Koster. It has an exhibition with photos, interactive activities and a microscope where you can look at your own beach discoveries. There is also an aquarium here with a touch tank where you can see and feel some of Kosterhavet’s inhabitants. 

Photographer: Lovéncentret Tjärnö

  • Tjärnö Aquarium. During summer vacation period we welcome the public to this most species-rich aquarium in Sweden. Visitors can also study small living marine organisms in stereo microscope. Two marine biologists are present to answer questions, and give so-called Live presentations about i.e. oysters, lobster, crabs or jelly fishes. Film is shown in the auditorium.


- Diversity of the Sea

From the research vessel Nereus we make measurements in the water and collect algae and animals from the Kosterhavet Marine National Park and look more into them in stereo microscope in the laboratory. Entrance to Tjärnö Aquarium is included. Booking in advance.

- Filming in the Kosterhavet Deep

From the research vessel Nereus we deploy a Remotely Operated Vehicle equipped with a video camera. We film life at 100 metres depth and show it in real-time on a monitor on board. A guide explains what we see. ”Fika” (coffe/tea/juice and a cinnamon roll) is included. In collaboration with Kosterhavet Marine National Park.

More information and booking>>


Photographer: Håkan Karlsson

More activities for children:

  • Go fishing or seal spotting, boat trips in summer season from (the Square) Norra Hamnen in Strömstad.

Photographer: Halldór Kolbeins

Crab fishing – this is what to do!

Catching crabs from the pier – every child's favourite pastime!
Tie a peg to the end of a piece of string, clip a crushed sea mussel to the peg, lower it into the water by a stony beach and wait.....

Haul in the fishing line once the crab starts eating the mussel and place the crab in a bucket of seawater. Always release the crabs back into the sea afterwards!

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