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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!
Fish are vertebrates (vertebrates have backbones) that live in water. They breathe using special organs called gills.
fish, Any of more than 30,000 species of predominantly cold-blooded vertebrate s found worldwide in fresh and salt water. Living species range from the primitive lampreys and hagfishes through the cartilaginous shark s, skates, and ray s to the abundant and diverse bony fishes. Species range in length from 0.4 in. (10 mm) to more than 60 ft (20 m).
Photo of Paedocypris progenetica by Sophia (CC BY-NC-ND 3.0); whale shark photo by Julie Edgley (CC BY-SA 2.0). The cyprinid fish (8mm) and the whale shark (12m) are some of the smallest and largest fish in the sea. At first, this might seem like an easy question to answer, but it is difficult to define what makes a fish a fish because there is so much diversity among animals that we consider ...
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.
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.
Aug 8, 2019 · 10 Essential Facts About Fish. By. Bob Strauss. Updated on August 08, 2019. One of the six main groups of animals —along with invertebrates, amphibians, reptiles, birds, and mammals—fish are so abundant in the world's oceans, lakes, and rivers that new species are constantly being discovered. 01. of 10. There Are Three Main Fish Groups.
