The ryömäläinen is a bottom-dwelling scavenger common to the fast-flowing streams of Fennoscandia.  As adults, these creatures rarely use  jet-propulsion or the bouyancy of their shells to swim, but instead rely on their powerful tentacles for locomotion.

    Because of their ability to crawl against the pull of a current, ryömäläinen are also able to climb against the pull of gravity, and so are often seen crawling though the soggy grass, on the way from one river to another.

(Text by Daniel Bensen)