TWO: Chondricythes- Possessing Cartilage, Heterocercal Ffin
Osteichthyes- Possessing Bones and homocercal fin.
fish are are vertebrates
My reference is a book which is "A Cyber Science".It says here that there are so many phyla.Example of phyla:Phylum PlatyhelminthesPhylum NemathelminthesPhylum AnnelidaPhylum ArthropodaPhylum PoriferaPhylum ChordataPhylum NematodaPhylum CoelenterataPhylum MolluscaPhylum GastropodaI can't explain these phyla but maybe a week, I can see a reference book who has these definitions.
Fish are general classified into one phylum which is known as chordata. There some fish like the hagfish that are not able to fit into this phyla properly.
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There are 3 syllables. Bon-y fish.
The Osteichthyes is evolved from lungs of early bony fish. The fish have many types of evolved.
Bony fish have many gill filaments because they use them to breathe. They are also used to transfer things like water and ions.
Bony fish belong to the Class Sarcopterygii (if lobe-finned) and the Class Actinopterygii (if ray-finned). Coelacanths and lungfish are lobefinned and about all other bony fish are ray-finned. The two classes used to be combined as Class Osteichthyes. There are many superorders and orders in the bony fish classes.
Class Pisces, commonly known as fish, comprises over 32,000 species, making it one of the most diverse groups of vertebrates. This class is further divided into three main groups: jawless fish (Agnatha), cartilaginous fish (Chondrichthyes), and bony fish (Osteichthyes). The exact number of species can vary as new species are discovered and classifications are updated.
Fish that are classified as bony fish, or Osteichthyes, typically have a lot of bones in their bodies. This group includes species like salmon, trout, and tilapia. Unlike cartilaginous fish such as sharks and rays, bony fish possess a skeleton made primarily of bone, which contributes to their structure and buoyancy. Additionally, many bony fish have numerous small bones, making them challenging to eat without encountering bones.
There are seven classes of vertebrates. They are the jawless fish, the cartilaginous fish, the bony fish, the amphibians, the reptiles, the mammals, and the birds. Within each group there are many species.
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