Abstract: Kappphycus striatum is one of the carrageenan-producing seaweeds. Seaweed cultivation is increasing along with the increasing use of carrageenan. In general, carrageenan is used in the food, cosmetic and pharmaceutical industries. Furthermore, the carrageenan content of seaweed is strongly influenced by the oceanographic conditions in which the seaweed is cultivated. Measurement of the quantity of carrageenan yielded a value of 43.50 – 80.63 % with an average of 63.62 % ± 12.54. The quantity of seaweed is affected by turbidity, phosphate, current velocity and temperature.