jawless fish

• Peixe pertencente ao grupo dos agnatos, caracterizado pela ausência de mandíbulas e de nadadeiras pares, incluindo as lampreias e feiticeiras atuais, além de muitas formas fósseis pré-históricas.

A type of fish belonging to the superclass Agnatha, characterized by the absence of jaws and paired fins, including modern lampreys and hagfish, as well as many extinct prehistoric forms.

1. AgnathanC1formal

   A type of primitive fish that lacks a jaw, belonging to the superclass Agnatha.

   Peixe sem mandíbula

   • Lampreys and hagfish are the only surviving species of jawless fish.
   • Fossils of jawless fish date back to the Ordovician period.
   • Jawless fish have a cartilaginous skeleton and a round, sucker-like mouth.