: any of the taxonomic group (Agnatha) of primitive vertebrates without jaws including cyclostomes and extinct related forms — compare bony fish, cartilaginous fish
Examples of jawless fish in a Sentence
Recent Examples on the WebSo Holmes and his colleagues looked at nearly 190 creatures in other vertebrate classes — from jawless fish such as lampreys, which have changed little from their evolutionary ancestors, to reptiles such as turtles.
Giorgia Guglielmi, Scientific American, 5 Apr. 2018
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