With an average of 3% carbon content in FW kelp tissues, 306.43 tonnes of carbon would be removed per year. With the value for carbon removal often cited to be around USD 30 per tonne (Lackner, 2003), this would represent a CTC of USD 9 192.96: a large amount of carbon, but for a much smaller financial amount, underlining the difficulty in removing dissolved nutrients from aquatic systems and the acute issue of their presence in coastal systems. In the case of shellfish, accumulation of nitrogen, phosphorus and carbon should be considered both in meat and shells, especially rich in calcium carbonates.