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29 cze 2022 · The five main groups of vertebrates are fish, amphibians, reptiles, birds, and mammals. There are actually more categories, since bony fish are separate from jawless fish (lampreys and hagfish), cartilaginous fish (sharks and rays), and lobe-fin fish (lungfish and coelacanths).
Fish are cold-blooded animals that live exclusively in water, while mammals are warm-blooded and can live in various habitats, including land and water. Fish have gills to extract oxygen from water, while mammals have lungs to breathe air.
Look at the phylogeny here. Almost everything you see on this phylogeny is a fish — with one exception. The lobe-finned lineage (technically called the Sarcopterygii, sar-KOP-tuh-RIJ-ee-eye) includes both the lobe-finned fish and four-legged vertebrates, like frogs, dinosaurs, bats, and us humans!
21 maj 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.
29 wrz 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.
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 ...
Fish and Fishes. Fish are aquatic vertebrate animals that have gills but lack limbs with digits, like fingers or toes. Recall that vertebrates are animals with internal backbones. Most fish are streamlined in their general body form.
