Lampreys and Amniotic Sacs: Understanding Reproduction in Jawless Fish

No, lampreys do not have an amniotic sac. Amniotic sacs are found in amniotes, a clade of vertebrates that includes reptiles, birds, and mammals. Lampreys are jawless fish that belong to the class Agnatha, and they do not have an amniotic sac at any stage of their life cycle.