Sea squirts are small, filter-feeding organisms that grow on anything resembling a semi-compact substrate. In addition to having a funny name, it is a superorganism that can filter up to 3 liters per hour and up to 150 liters per day, a characteristic it shares with its good friend the mussel.
About Marea:
Marea is an organization that works actively with marine restoration initiatives in Norway. Through various restoration projects, they aim to contribute to optimal biodiversity along Norway's coast, fjords, rivers and lakes.
The event is free and open to all, but with a maximum capacity of 10 persons, so register in Nettskjema to secure a spot: https://nettskjema.no/a/363183