Capture fisheries, aquaculture, industrial fishing, small-scale fishing and sports fishing all have different participants and face different challenges. Aquaculture is in many ways like agriculture, with a fairly predictable output for any given input. Sports fishing is a case apart, not driven by the same profit needs as professional fishing. Capture fisheries, whether large or small-scale, are based on a raw material whose availability can be highly unstable and unpredictable.