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A fish (pl.: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits. Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and ...
Jun 24, 2024 · fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys and hagfishes through the cartilaginous sharks, skates, and rays to the abundant and diverse bony fishes.
Jan 3, 2023 · Instead, there are 3 main classes, groups, or types of fish: bony fish (Osteichthyes), jawless fish (Agnatha), and cartilaginous fish (Chondrichthyes). Fish are the most diverse group among vertebrates, with over 33,000 different types of fish species.
About Fish. All fish share two traits: they live in water and they have a backbone—they are vertebrates. Apart from these similarities, however, many of the species in this group differ...
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 shark s, skates, and ray s to the abundant and diverse bony fishes.
Fish are cold-blooded, gill-bearing aquatic organisms that lack limbs. Fish have great diversity, including armoured fish, jawless fish, lobe-finned fish, cartilaginous fish, and ray-finned fish. In the taxonomic hierarchy, fishes belong to the kingdom Animalia, phylum Chordata and class Pisces.
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.
Feb 12, 2019 · What is a fish? Here you can learn more about the characteristics of fish, and what sets them apart from other animals.
Aug 8, 2019 · The world's oceans, lakes, and rivers harbor tens of thousands of fish species. Here are 10 essential facts about fish that everyone should know.
