Yes, Brown algae differs from Red and Green algae because Brown algae is used as a thickener in alot of foods. Red and Green algae are used for most of the time for fish and other underwater animals...
Red Algae - grows 1 to 3 ft tall. - live in warm salt water. - contain HIGH amounts of calcium Brown Algae -3-350 ft tall - "carageenan"--- labeled in ice cream & soda pop. Green Algae - less...