University of Gothenburg
Persons on a ship
Excursion with research vessel, for the public
Photo: Hans Björkman

For the Public

The public is welcome to visit Tjärnö Marine Laboratory all year around. Most activities are offered during summer vacation period (early July to mid-August). Some activities are meant for groups and are booked in advance, while others are for families or individuals and don't need to be booked.


Guided Tour

All year around companies, organisations etc. can book a guided tour of the Tjärnö Laboratory. The tour take count of previous knowledge and interests of the visiting group. The tour can consist of seeing ongoing university education, current research, research vessels, Tjärnö Aquarium and film. We inform about the sea in general, university education, research and marine environmental issues.

Maximum group size is 20 persons. The tour lasts normally 1.5 hours. We offer the tours workdays daytime, but if agreed upon groups can also visit during evenings and weekends.

Beach Excursion

From May to mid-October Tjärnö Laboratory offer a beach excursion, where participants discover life on a shallow sandy bottom. We bring field equipment (waders, aquascopes, spades, nets etc.) and a trained marine biologist. However, group participants are the most active, finding lugworm, sand gaper, common shrimp, shore crab, netted dogwhelk, flatfishes, sand eels, eelgrass etc. etc. Together with the group, the marine biologist go through the findings and inform about seasonal variation and the importance of shallow soft bottoms to the fishery, for instance.

This activity is equally engaging for adults as for children.

Maximum group size is 20 persons. The beach excursion lasts 2 hours. We offer the beach excursion workdays daytime, but if agreed upon groups can also visit during evenings and weekends.

Research Vessel Excursion, for groups

Subject to availability, non-school groups can book a research vessel excursion with Nereus. Activity length is 1.5 hours or longer.



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 at hand to answer questions, and give Live-presentations about, for instance, oyster, lobster, crabs or jellyfishes. Film is shown in the auditorium. We sell postcards, posters and books.

Opening hours

Monday-Friday, 14.00–17.00 during period 27 June – 12 August
Wednesday 22 June, 14.00–17.00
Wednesday 17 August, 14.00–17.00

Webcam above the touch pool

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.

Dates for Diversity of the Sea
Wednesday 29 June, 14.30–17.00
Tuesday 5 July, 14.30–17.00
Tuesday 12 July, 14.30–17.00
Tuesday 19 July, 14.30–17.00
Tuesday 26 July, 14.30–17.00
Tuesday 2 August, 14.30–17.00
Tuesday 9 August, 14.30–17.00

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.

8 July 10.00–13.00, departure from Ekenäs, Sydkoster
15 July 09.00–12.00, departure from Tjärnö Laboratory
5 August 10.00–13.00, departure from Ekenäs, Sydkoster
12 August 09.00–12.00, departure from Tjärnö Laboratory

Tickets for trips with departure from Ekenäs should be booked in advance at Naturum visitor centre ( or 010–224 54 00). Tickets for trips with departure from Tjärnö Laboratory should be booked in advance at Tjärnö Laboratory.

West Coast Maritime Week 2022

Activities on Tjärnö

Tjärnö Aquarium is open 8-12 August, 14.00–17.00. Free admittance. For further information, look under Tjärnö Aquarium above.

Diversity of the Sea, 9 August 14.30–17.00. For further information, look under Diversity of the Sea above.

Theme activities: Information in Swedish. These remains to be decided.

Filming in the Kosterhavet Deep. 12 August 09.00–12.00. For further information, look under Filming in the Kosterhavet Deep above.

Photo: Linnea Cervin