A screen alone is basically not a fish protection system and does not reliably protect fish from injury. As a component of a fish protection system, it is only effective if it can develop a guiding effect through angular flow. As a fish protection screen, it guides the fish away from the hazardous area and towards the second component of the fish protection system, the bypass. In the best case, the fish reach the bypass inlet directly in front of a clearly detectable bypass inlet. The bypass must provide them with a harmless migration corridor into the tailwater and should not trigger any avoidance reaction. Under these conditions, the behavioral protection effect of a fish protection screen can also contribute significantly to fish protection. This infographic shows and explains the components. The infographic is part of the fact sheet "What makes a screen to a fish protection screen? The functional components of a fish protection system."

The infographic is published under a creative commons license CC BY 4.0. That means it can be copied and redistributed in any medium or format and for any purpose as long as appropriate credit to the authors (Ecologic Institute, Institute of Aquatic Ecology and Fish Biology, IGF Jena) is given.