Sweetfish

The Sweetfish is a river fish in the introduced in. It can be found from July to September in all games except in which it can be found from July until August.

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The Sweetfish can be found swimming near the surface in the pond aquarium in the first fish room.

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The Sweetfish can be found in the middle-right tank in the aquarium.

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Once donated to the museum, the Sweetfish can be found in the second tier of the waterfall fish-tank with the Stringfish and Freshwater Goby.

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During a Fishing Tourney, when given a Sweetfish, Chip will say the following:

Real-world information
The sweetfish, or ayu, is an amphidromous fish, the only species in the genus Plecoglossus and in family Plecoglossidae. It is a relative of the smelts and is placed in the order Osmeriformes. Native to the Palearctic ecozone, it is found in rivers, lakes, and coastal waters of western Hokkaidō in Japan southward to the Korean Peninsula, China, and Taiwan. The name "sweetfish" is from the sweetness of its flesh. Regarding its typical one-year life span, it is also known as nen-gyo ("year-fish"). It is Gunma prefecture's prefectural fish.