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Fish are vertebrates (vertebrates have backbones) that live in water. They breathe using special organs called gills.
Jan 3, 2023 · Fish are the most diverse group among vertebrates, with over 33,000 different types of fish species. No one really knows how many different types of fish exist in the world, more are being discovered constantly. We may soon have over 35,000, or even 40,000 known species!
Jul 28, 2022 · A fish is an aquatic vertebrate with fins and gills. The body of a typical fish is streamlined and covered in protective scales. Around half of all known vertebrates are fish, making fish the dominant vertebrate animals on the planet. Fish are found in both salt and freshwater habitats in most parts of the world.
Animals. Reference. Freshwater Fish. Nearly half of all fish species live in fresh water, which means they swim in the rivers, lakes, and wetlands that make up less than 3 percent of Earth’s...
Fish (plural: fish or fishes) are a group of animals which live in water and respire (get oxygen) from their gills. As a group, they are much older than other vertebrates. The first fish developed about 500 million years ago. [4] Fish used to be a class of vertebrates. Now the term covers five classes of animals that live in the water: Jawless fish
fish, Any of more than 30,000 species of predominantly cold-blooded vertebrates found worldwide in fresh and salt water. Living species range from the primitive lampreys and hagfishes through the cartilaginous sharks, skates, and rays to the abundant and diverse bony fishes. Species range in length from 0.4 in. (10 mm) to more than 60 ft (20 m).
Home Science Birds, Reptiles & Other Vertebrates Fish. Fishes have been in existence for more than 450 million years, and they have evolved to fit into almost every conceivable type of aquatic habitat, including both fresh and salt waters.
