The birds in the national park are marine species. In addition to the arctic tern, which is the emblem bird for the national park, you may also see the velvet scoter, the black guillemot, the white-tailed eagle, the ruddy turnstone, the temminck's stint, or the greater scaup in the archipelago.

The majority of the water areas of the Bothnian Bay National Park belong to the public waters of the sea. Fishing is allowed in public waters in accordance with the Fishing Act and the current fishing regulations with appilicable permits. Persons aged 18-69 years must pay the fisheries management fee. Chech the restrictions before fishing.

You may canoe and row between the islands and around them. The most highly skilled canoeists venture out onto the open sea. There are no marked paddling routes in the national park.

Most shores are rocky and fairly shallow. There are sandy beaches on the islands of Vähä-Huituri and Pihlajakari. On Selkä-Sarvi, the beach on which the sauna is located is a good swimming place. There are no restrictions on swimming. You'll swim in waters of the national park at your own risk.