Combining data from four shellfish farms in southwest England, the potential weekly loss in sales due to HABs could range between £26,350 and £100,000. These costs were based on the selling price of mussels and the weekly quantity produced during summertime in the UK, but do not include the cost of recalling the mussels if they have already been dispatched. Recalling 1 tonne of mussels in the UK can cost around £160.