Rahway River migrations. Fish ladders are inundated structures with small underwater steps that allow fish to navigate around a dam and continue their migration. Other approaches include removing obstructions that are inoperative or no longer serve their purpose, or improving water quality and reducing debris that obstructs passage. The fish targeted for upstream passage at the Rahway River Water Supply Dam are alewife (Alosa pseudoharengus), blueback herring (Alosa aestivalis), gizzard shad (Dorosoma cepedianum), white perch (Morone Americana) and the endangered American eel (Anguilla rostrate). Alewife and blueback herring are collectively referred to as river herring due to their similarity in appearance, range,
Smoked fish provinces, but is a popular deli item throughout the country. Smoked fish is a prominent item in Russian cuisine, Ashkenazi Jewish Cuisine, and Scandinavian cuisine, as well as several Eastern and Central European cuisines and the Pacific Northwest cuisine. In Israeli cuisine, smoked trout is traditionally eaten as part of meze, especially at breakfast. Sometimes rosemary leaves are added. Trout can be found in streams and rivers across the country as well as in the Sea of Galilee. English, Scottish and Canadian cuisine incorporate a variety of strongly brined, smoked herring that used to be known as "red herring". With