These graceful mollusks were swimming backward by means of their locomotive tubes, sucking water into these tubes and then expelling it. Six of their eight tentacles were long, thin, and floated on the water, while the other two were rounded into palms and spread to the wind like light sails.
Nyolc csápjuk közül hat hosszú, keskeny csáp a vízen lebeg, két kerek, tenyér alakú csáp pedig, mint valami könnyű kis vitorla feszül a levegőben a szélnek.