Aquaculture fish production has increased significantly over the past few decades, which has led to intensive fish culture practices where stressors like overcrowding, transport, handling, grading and poor water quality are common. It is widely demonstrated that farmed fish are more susceptible to disease agents due to the stressors posed by intensive rearing. Bacterial infection causes a high rate of mortality in human population and aquaculture organisms. It is a primary pathogen of fishes, which causes a systemic infection leading to disease and death. The development of aquaculture has seen considerable economic losses due to pathogens of Vibrio sp. The uses of immunostimulants of seaweeds in aquaculture are presented in this review.

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