The cannelurehangers from Reefsystems can be applied on existing and new sheet pile installations to support the restoration of fragmented fish migration routes. Within the baskets of the cannelurehangers natural substrate can be placed for plants and other organisms to grow. Underwater the cannelurehangers create a green aqua wall to restore the health of ecosystems. The natural substrate and growing plants create habitats, wherein local and migrating fish can find food, shelter and a save space to reproduce. Above water the cannelurehangers create habitats wherein waterbirds, bees and other insects can nest. The cannelurehangers create a pleasant street view and have a positive environmental impact.