extinct agnathans

Are Species Of Jawless Fish Still Alive Today?

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Are Species Of Jawless Fish Still Alive Today? Of the great diversity of primitive jawless fish, only two types of jawless fish survive today: hagfish (also known as slime eels, about 60 species) and lampreys. Both are very derived and are not equivalent to their Paleozoic ancestors. When did jawless fish go extinct? Ostracoderms (shell-skinned)

Are Guppies Jawless Fish?

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Are Guppies Jawless Fish? Lampreys and hagfishes are unusual, jawless fish that comprise the order Cyclostomata, so named because of the circular shape of the mouth. Which of the following is jawless? Lampreys and hagfishes are the only living members of jawless vertebrates, the most ancient lineage of vertebrates, and are therefore a crucial group