Fish - Wikipedia
网页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 | Definition, Species, Classification, & Facts | Britannica
网页2024年9月12日 · 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.
Fish Pictures & Facts - National Geographic
网页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: Different Types, Definitions, Photos, and More - A-Z ...
网页2023年1月3日 · 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.
5 Healthiest Fish to Eat and Which to Limit, According to a ...
网页1 天前 · However, some fish may be healthier than others. Salmon, mackerel, sardines, rainbow trout, and anchovies are five of the healthiest fish to eat. The healthiest fish are rich in nutrients, like omega-3 fatty acids, and low in contaminants, like mercury. Sustainably sourced fish may be a consideration. Fish like king mackerel, marlin, orange ...
12 Best Types of Fish to Eat - Healthline
网页2023年2月1日 · Fish are undeniably a healthy food, but they can have high levels of contaminants, too. Save this list of some of the safest fish with the best nutrition profiles.
Fish species and physical features | Britannica
网页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 …
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