Aquatic animals members of the AgnathaAlso known as jawless fish, agnathans have eel-like bodies and are distinguished from fish for the absence of jaws and mandibles. More class, adult lampreys resemble small eels, yet characterized by a funnel-like sucking mouth. Today this species is considered rare and at risk of local extinction, and it is therefore subject to protection by the European Union. Resurgences and ditches in Bressanvido are still populated by small groups of lampreys, found cleaning the graveled riverbeds before depositing their eggs.