From Cal Trout, the current – The Fish Food on Flooded Farm Fields

program aims to help dwindling salmon populations by recreating floodplain-like wetland habitats on winter-flooded farm fields. The program works with rice farmers and water districts to intentionally inundate rice fields in the non-growing season to create the near-ideal conditions to grow the water bugs on which juvenile salmon and other fish depend on as a food source. Tons and tons of water bugs can be grown in these floodplain fields and sent into the nearby river channels where the fish are, to replenish the fish food supplies that have been dramatically reduced over the decades due to the river being disconnected from the natural floodplain. (more).