Jisho

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Noun
1. path taken by school of fish; fish ladder; fishway
Wikipedia definition
2. Fish ladderA fish ladder, also known as a fishway, fish pass or fish steps, is a structure on or around artificial barriers to facilitate diadromous fishes' natural migration. Most fishways enable fish to pass around the barriers by swimming and leaping up a series of relatively low steps (hence the term ladder) into the waters on the other side.
Read “Fish ladder” on English Wikipedia
Read “魚道” on Japanese Wikipedia
Read “Fish ladder” on DBpedia

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