page_title: Fish ladder
section_title: See also
hierarchical_section_title: Fish ladder / See also
context_page_description: A fish ladder, also known as a fishway, fish pass or fish steps, is a structure on or around artificial and natural barriers to facilitate diadromous fishes' natural migration as well as movements of potamodromous species. Most fishways enable fish to pass around the barriers by swimming and leaping up a series of relatively low steps into the waters on the other side. The velocity of water falling over the steps has to be great enough to attract the fish to the ladder, but it cannot be so great that it washes fish back downstream or exhausts them to the point of inability to continue their journey upriver.
context_section_description: Culvert
  Eel ladder
  Elver pass
  First "Denil" style dam in Illinois.
  Fish migration
  Fish screen
  Pitlochry fish ladder
  Salmon run
caption: FERC Fish Ladder Safety Sign