Jonathan Vishnevski
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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.Most fish are cold-blooded, their body ...
Jul 7, 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.
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 markedly from one ...
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 ...
Jul 28, 2022 · A lamprey. Jawless fish belong to the group Agnatha.As their name suggests, jawless fish lack jaws. Instead, they have round, sucker-like mouths. There are two types of jawless fish alive today: hagfish and lampreys.Both have long, eel-like bodies.
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 ...
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).
May 21, 2024 · Fish are aquatic vertebrates that typically have gills, fins, and a streamlined body. They inhabit diverse environments, from freshwater rivers and lakes to salty oceans and deep seas. Shared Characteristics with Other Vertebrates
Jul 7, 2024 · Fish - Classification, Jawless, Cartilaginous & Bony Fishes: Fishes are typically divided into three groups: superclass Agnatha (jawless fishes), class Chondrichthyes (cartilaginous fishes), and superclass Osteichthyes (bony fishes). The latter two groups are included within the infraphylum Gnathostomata (jawed vertebrates). Fish classification has undergone major revisions, and further ...
This is a difficult question to answer because fishes have a huge variety of body forms. The popular concept of a fish as an animal that has fins and scales, and lives in water, is not strictly correct.
