Domesticated carp whose Niigata colour mutations became a global pond aesthetic -- not a wild goldfish substitute.
Also called: nishikigoi · ornamental carp · living jewel
Koi is one of 24 types in this animals atlas. The pages treat it as a full system -- history, anatomy, operating principles, culture, icons, future pressure and market shape -- not a ranking of a best species.
Scores compare the koi with the other 23 types on speed, intelligence, range, resilience, cultural impact and ecological role. They are relative editorial marks. Resilience high means more secure; low means threatened. Domestic and abundant; wild common carp are invasive in many basins. Resilience here means the ornamental lineage is secure, not that escaped koi are harmless.
Seven chapters follow: origins, systems, how the animal works, cultural life, named icons, what conservation can still change, and how tourism, conflict, fisheries and parks move money.
Deep introduction
Koi is not a single postcard animal. It is a set of populations, subspecies and human rules inside the fish family of this atlas.
Diversity, bodies, culture and ranges — plus a lens tuned to this language region.
Field guides collapse many lineages into the English word koi. Subspecies, flyways and captive lines do not share one fate -- bald eagles and Philippine eagles, or western and mountain gorillas, are the caution.
This atlas picks a Wikipedia title as the hero image and then keeps the rest of the grade in view so a recovered stock cannot launder a CR cousin.
A heavy-bodied cyprinid with barbels and a pharyngeal mill. Ornamental lines select skin cells, not wild streamlining.
Omnivorous pond browsing -- pellets, plants, invertebrates. Winter metabolism drops in unheated outdoor ponds.
English-language culture met the koi through film, law, heraldry and zoos. Those portrayals move money and sometimes take; they are not a field census.
The culture chapter dates posters and statutes so a 1975 film or a 1961 logo cannot pretend to be a 2020s Red List.
Domestic and abundant; wild common carp are invasive in many basins. Resilience here means the ornamental lineage is secure, not that escaped koi are harmless.
Tourism, conflict payments, quotas and captive loans are dated economic bands in the market chapter -- not live prices and not a best-species prize.
Life-science deep dive
Koi biology is a stack of structure, energy, sensing and hard limits. The four sections below are the same headings used across the atlas so types can be compared without a best-species frame.
Anatomy, senses, behaviour and limits — plus field language for this region.
A heavy-bodied cyprinid with barbels and a pharyngeal mill. Ornamental lines select skin cells, not wild streamlining.
Load paths and tissues (not metals) are expanded in the anatomy chapter.
Omnivorous pond browsing -- pellets, plants, invertebrates. Winter metabolism drops in unheated outdoor ponds.
The how-it-works diagrams reduce that budget to a six-node loop.
Taste barbels and a lateral line in still water. Show judging is a human sense laid over the fish.
Control here means the animal steering itself -- not a vehicle ECU.
KHV, poor water, and escape into wild basins. A champion pattern does not confer disease immunity.
Resilience scores encode those limits relative to the other 23 types.
Licensed photographs of this species — heroes, eras and icons on one wall.
Same family, different scores — pick a duel.
Closest neighbours on the six atlas axes — speed, intelligence, range, resilience, culture and ecological role.
Amazon knifefishes whose stacked electrocytes taught Humboldt, Volta arguments and a 2019 species split.
Overall 36 🐠Anemone-dwelling damselfish whose 2003 film fame became a capture-and-reef case study.
Overall 41 🐼A bamboo specialist whose WWF logo, Wolong quake and 2016 IUCN downlist from EN to VU made a recovery into a brand.
Overall 41 🐡Beak-toothed inflators whose tetrodotoxin made a Japanese cuisine and a genome project out of one family.
Overall 41Apex lamnid whose warm muscle, broad diet and 1975 cinema still outrun the tagging papers.
Overall 66 🐟Anadromous fishes that move ocean fat onto spawning gravels -- and into forests, treaties and hydropower fights.
Overall 63 🐟A warm-bodied tuna whose Tokyo auction prices and ICCAT quotas made a single fish into a geopolitical unit.
Overall 54 🐠Anemone-dwelling damselfish whose 2003 film fame became a capture-and-reef case study.
Overall 41 🐴Upright syngnathids whose male pregnancy and dried-medicine trade made a small fish a CITES case.
Overall 28 🐡Beak-toothed inflators whose tetrodotoxin made a Japanese cuisine and a genome project out of one family.
Overall 41 ⚡Amazon knifefishes whose stacked electrocytes taught Humboldt, Volta arguments and a 2019 species split.
Overall 36