Abstract: Algae carbon constitutes an important part in fishery carbon sinks. Three algae development scenarios, namely, the baseline, kelp positive and kelp negative, were designed to evaluate their effect on fishery carbon sinks. The results showed that, in comparison with the baseline scenario, the kelp positive type increased, while the kelp negative type reduced the carbon sink. The kelp positive type would aggregate algae carbon sinks to reach 1.189 million tons in 2020. That would be 152.75 tons more than the baseline could provide. It was, therefore, speculated that kelp aquaculture could be applied as an important means for increasing the fishery carbon sink.