This requires accurate data on how many fish are being caught each year by all fishing activities along with other information, such as from research surveys, to monitor stock trends. Without data on recreational fishery catches, only part of the picture is available for important recreational angling stocks such as sea bass and cod. This could result in greater uncertainty about the status of a stock, which makes it more difficult to know if the restoration of stocks to a healthy condition is on track. Sea angling surveys are designed to provide the type of data on recreational catches and releases needed in future years to improve our knowledge of the trends and sustainability of stocks.