What does jawless fish mean?
Definitions for jawless fish
jaw·less fish
This dictionary definitions page includes all the possible meanings, example usage and translations of the word jawless fish.
Princeton's WordNet
jawless vertebrate, jawless fish, agnathannoun
eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
Wikipedia
jawless fish
Agnatha (, Ancient Greek ἀ-γνάθος 'without jaws') is an infraphylum of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of both present (cyclostomes) and extinct (conodonts and ostracoderms) species. Among recent animals, cyclostomes are sister to all vertebrates with jaws, known as gnathostomes.Recent molecular data, both from rRNA and from mtDNA as well as embryological data, strongly supports the hypothesis that living agnathans, the cyclostomes, are monophyletic.The oldest fossil agnathans appeared in the Cambrian, and two groups still survive today: the lampreys and the hagfish, comprising about 120 species in total. Hagfish are considered members of the subphylum Vertebrata, because they secondarily lost vertebrae; before this event was inferred from molecular and developmental data, the group Craniata was created by Linnaeus (and is still sometimes used as a strictly morphological descriptor) to reference hagfish plus vertebrates. While a few scientists still regard the living agnathans as only superficially similar, and argue that many of these similarities are probably shared basal characteristics of ancient vertebrates, recent taxonomic studies clearly place hagfish (the Myxini or Hyperotreti) with the lampreys (Hyperoartii) as being more closely related to each other than either is to the jawed fishes.
ChatGPT
jawless fish
Jawless fish, also known as Agnatha, are a group of fish that lack jaws. They are characterized by their elongated bodies and absence of paired fins. Instead of jaws, they have a round mouth surrounded by a ring of teeth used for feeding. They also have cartilage-based skeletons and single gill openings. The two existing groups of jawless fish are the hagfish and the lampreys. These species are among the most primitive of all fish, dating back hundreds of millions of years.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of jawless fish in Chaldean Numerology is: 3
Pythagorean Numerology
The numerical value of jawless fish in Pythagorean Numerology is: 5
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"jawless fish." Definitions.net. STANDS4 LLC, 2024. Web. 24 Apr. 2024. <https://www.definitions.net/definition/jawless+fish>.
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