Animalia > Chordata > Actinopterygii > Osmeriformes > Plecoglossidae > Plecoglossus > Plecoglossus altivelis

Plecoglossus altivelis (Ayu)

Synonyms: Plecoglossus altevalis; Plecoglossus altivelis altivelis; Plecoglossus altivelis chinensis; Plecoglossus altivelis ryukyuensis; Plecoglossus ryukyuensis; Salmo altivelis

Wikipedia Abstract

The ayu (アユ, 鮎, 年魚, 香魚) or sweetfish, Plecoglossus altivelis, is a species of fish. It is the only species in the genus Plecoglossus and family Plecoglossidae. It is a relative of the smelts and other fish in the order Osmeriformes. Native to the Palearctic ecozone, it is distributed in the northwestern Pacific Ocean along the coast of Hokkaidō in Japan southward to the Korean Peninsula, China, and Hong Kong. It is amphidromous, moving between marine and freshwater bodies. It can be found in local rivers and lakes. It is an introduced species in Taiwan.
View Wikipedia Record: Plecoglossus altivelis


Maximum Longevity [2]  3 years
Migration [1]  Amphidromous


Name Countries Ecozone Biome Species Report Climate Land
Hawaiian Islands United States Oceania Oceanic Islands    
Honshu - Shikoku - Kyushu Japan Palearctic Temperate Coastal Rivers    

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Mount Odaigahara and Mount Omine Biosphere Reserve 88558 Kyushu, Japan  
Shiga Highland Biosphere Reserve 32124 Honshu, Japan  

Prey / Diet

Oithona fallax[3]
Oithona longispina[3]
Oithona plumifera[3]
Paracalanus aculeatus[3]
Paracalanus parvus[3]


Parasitized by 
Acanthocephalus opsariichthydis[4]
Clinostomum complanatum[4]
Echinochasmus japonicus <Unverified Name>[4]
Echinochasmus perfoliatus <Unverified Name>[4]
Exorchis major <Unverified Name>[4]
Exorchis oviformis[4]
Fibricola seoulensis <Unverified Name>[4]
Gyrodactylus japonicus[4]
Gyrodactylus plecoglossi <Unverified Name>[4]
Gyrodactylus tominagai <Unverified Name>[4]
Ichthyascaris biwakoensis <Unverified Name>[4]
Metagonimus miyatai <Unverified Name>[4]
Metagonimus takahashii[4]
Metagonimus yokogawai[4]
Neoplagioporus ayu[4]
Proteocephalus plecoglossi <Unverified Name>[4]
Pseudexorchis major <Unverified Name>[4]
Raphidascaris biwakoensis <Unverified Name>[4]

Range Map

Asia - Inland waters; China; Japan; Pacific Ocean; Pacific, Northwest; Palearctic;



Attributes / relations provided by
1Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at
2Frimpong, E.A., and P. L. Angermeier. 2009. FishTraits: a database of ecological and life-history traits of freshwater fishes of the United States. Fisheries 34:487-495.
3Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
4Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access