USFWS caption at https://www.fws.gov/story/reviving-river-herring: "Blueback herring and alewife, known collectively as river herring, are good representatives for other fish species that migrate between salt and freshwater." USFWS captkion at https://www.fws.gov/story/2025-06/us-fish-and-wildlife-service-and-partners-announce-more-234-million-fish-conservation: "River herring returning up the Merrimack River in New England. The National Fish Habitat Partnership works to conserve fish habitat nationwide, leveraging federal, state, Tribal, and private funding resources to achieve the greatest effect on fish populations through priority conservation projects"

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