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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 acanthodians.
Fin fish like salmon have gills, are covered in scales, and reproduce by laying eggs. Eels, by contrast, have worm-like bodies and exceedingly slimy skin. Lungfish gulp air. Whale sharks, the ...
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. Most fish species are cold-blooded; however, one ...
Feb 1, 2023 · Perch. Rainbow trout. Sardines. Striped bass. Tuna. Alaskan pollock. Char. Takeaway. The healthiest types of fish include those high in omega-3 fatty acids and have lower levels of mercury ...
Jan 3, 2023 · Fish are aquatic vertebrates. They usually have gills, paired fins, a long body covered with scales, and tend to be cold-blooded. “Fish” is a term used to refer to lampreys, sharks, coelacanths, and ray-finned fishes, but is not a taxonomic group, which is a clade or group containing a common ancestor and all its descendants. Instead, there are 3 main classes, groups, or types of fish ...
Fish are vertebrates (vertebrates have backbones) that live in water. They breathe using special organs called gills.
Blue shark Head-on view of a red lion-fish Carp Fish come in many shapes and sizes. This is a sea dragon (kira), a close relative of the seahorse.They are camouflaged as floating seaweed. Dunkleosteus, a giant armoured arthrodire of the later Devonian.Up to 6 metres long, it lived in the Inland seas of North America. This is one of the first works of art: a sculpture of a fish; age: about ...
Jul 28, 2022 · The world’s biggest fish is the whale shark, which has a maximum recorded length of 18.8 m / 61.7 ft. The second-largest fish is the basking shark, which has a maximum recorded length of 12.27 m / 40.3 ft. Unlike most sharks, which are active hunters, both the whale shark and the basking shark are filter feeders.
Feb 12, 2019 · Fish come in a wide variety of colors, shapes, and sizes - there's the largest fish, the 60+ foot long whale shark, popular seafood fish such as cod and tuna, and completely different-looking animals such as seahorses, sea dragons, trumpet fish, and pipefish. In all, about 20,000 species of marine fish have been identified.
Almost all natural bodies of water bear fish life, with the exception of very hot thermal ponds and extremely salt-alkaline lakes, such as the Dead Sea in Asia and the Great Salt Lake in North America. Although most fish species are cold-blooded, one especially contrarian species, the opah (Lampris guttatus), is warm-blooded.
