Order
Common name: Red Algae
Scientific name: Gigartinales
Gigartinales is an order of red algae that encompasses a variety of species often found in marine environments. These algae are known for their robust, often cartilaginous thalli, which can vary in color from deep red to purple. Many species within this order produce carrageenan, a substance used in the food industry as a thickener and stabilizer. In reef aquariums, members of Gigartinales can be both ornamental and functional, providing habitat and food for a range of marine organisms. They require moderate lighting and water flow, and some species can help with nutrient export by absorbing excess nitrates and phosphates.