ropes) and then cultured in the net cage (dimension: 3 m 3 m 4 m) with a density of 10 thalli m2 at a depth of 1.5 m, mimicking conditions at the control site. The average length and wet weight of the cultured S. hemiphyllum were 103.86 ± 17.72 cm and 29.34 ± 12.56 g, respectively, whereas those of S. henslowianum were 116.33 ± 23.36 cm and 40.96 ± 12.62 g, respectively. In the natural