| Summary: | <i>Caulerpa lentillifera</i> is a type of green macroalga that is commonly consumed as fresh seaweed, particularly in Southeast Asia. The effects of different salt types and concentrations on C. lentillifera during brine processing were investigated using table, sea and flower salt at 10–30% levels. The colour and texture of <i>C. lentillifera</i> varied across different treatments. After storage in brine for 12 weeks, lightness (<i>L*</i>) decreased, greenness (<i>a*</i>) decreased and yellowness (<i>b*</i>) increased while firmness increased in all treatments compared to fresh algae. The nutritional composition did not change significantly over time. To ensure the safety and quality of seaweed for consumption, the optimal salt level for brine processing should not exceed 30% table salt. The morphology and elements contained in different types of salt were also observed, and the microbiological safety of seaweed was evaluated. The popularity of <i>Caulerpa</i> macroalgae is rapidly increasing among consumers, leading to a growing demand for ready-to-eat <i>Caulerpa</i> products. However, food safety and security standards must be maintained.
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