The most productive areas on the Aa tend to be locations with structural variety — bridge crossings, confluences with other waterways, stretches with overhanging vegetation, and areas where aquatic weed beds create ambush points for pike and perch. Slower, deeper bends in the stream are worth targeting for zander and larger pike. The North Brabant waterway network is well connected, and areas near confluences with other streams or canals often concentrate fish, particularly during seasonal transitions.