What is another word for hyperoartia?
Pronunciation: [hˈa͡ɪpəɹˌɔːʃə] (IPA) 
Hyperoartia, also known as lampreys, are jawless fish found primarily in freshwater and some marine environments. Lampreys are considered one of the most ancient vertebrates, as they possess several characteristics that have not changed over millions of years. They are an important food source for other fish and provide benefits to ecosystems, including helping to control populations of other fish species. Synonyms for hyperoartia include jawless fish, primitive fish, lamprey eels, and pharyngognathous fishes. Despite being called eels, lampreys are not true eels, as they lack the scales and fins of true eels.
