"jawless fish." YourDictionary, n.d. Web. 14 October 2018. <http://www.yourdictionary.com/jawless-fish>.
jawless fish. (n.d.). Retrieved October 14th, 2018, from http://www.yourdictionary.com/jawless-fish
Any of various elongated marine and freshwater fishes lacking a jaw and paired appendages, sometimes thought to constitute the taxon Agnatha. The only extant jawless fishes are the hagfishes and the lampreys.