Marine algae Algae Marine algae culture Red algae Classification Halymenia Identification Marine algae -- Economic aspects -- Philippines -- Calatagan, Batangas Marine algae -- Philippines -- Calatagan, Batangas Marine flora -- Philippines -- Calatagan, Batangas Sargassum Seaweeds Alabat Island (Quezon) Algal growth Benthos Biology Botany Classification of plants Ecological surveys Ecology Epiphytes Eucheuma Handbooks, Manuals, etc Kappaphycus Manuals etc Marine algae industry Marine algae industry--Philippines Marine algae--Philippines Marine biology Marine resources