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

Plecoglossus altivelis (Ayu)

Wikipedia Abstract

The ayu (アユ, 鮎, 年魚, 香魚) or sweetfish, Plecoglossus altivelis, is an amphidromous fish, the only species in the genus Plecoglossus and family Plecoglossidae. It is a relative of the smelts, and is placed in the order Osmeriformes. Native to the Palearctic ecozone, it occurs in rivers, lakes, and coastal waters of western Hokkaidō in Japan southward to the Korean Peninsula, China, and Hong Kong.
View Wikipedia Record: Plecoglossus altivelis


Plecoglossus altivelis altivelis (Ayu sweetfish) (Attributes)
Plecoglossus altivelis ryukyuensis (Ryukyu ayu-fish) (Attributes)


Maximum Longevity [1]  3 years


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[2]
Oithona longispina[2]
Oithona plumifera[2]
Paracalanus aculeatus[2]
Paracalanus parvus[2]


Parasitized by 
Acanthocephalus opsariichthydis[3]
Clinostomum complanatum <Unverified Name>[3]
Echinochasmus japonicus <Unverified Name>[3]
Echinochasmus perfoliatus <Unverified Name>[3]
Exorchis major <Unverified Name>[3]
Exorchis oviformis[3]
Fibricola seoulensis <Unverified Name>[3]
Gyrodactylus japonicus <Unverified Name>[3]
Gyrodactylus plecoglossi <Unverified Name>[3]
Gyrodactylus tominagai <Unverified Name>[3]
Ichthyascaris biwakoensis <Unverified Name>[3]
Metagonimus miyatai <Unverified Name>[3]
Metagonimus takahashii <Unverified Name>[3]
Metagonimus yokogawai[3]
Neoplagioporus ayu <Unverified Name>[3]
Proteocephalus plecoglossi <Unverified Name>[3]
Pseudexorchis major <Unverified Name>[3]
Raphidascaris biwakoensis <Unverified Name>[3]

Range Map

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



Attributes / relations provided by
1Frimpong, 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.
2Jorrit 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.
3Gibson, 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