Chahra Bouasla Littler and Littler (1981) proposed a marine macroalgae morphological categorization system. This categorization system is based on the macroalgae's form and structure, which includes characteristics such as blade shape, blade attachment, and branching pattern. A system is a handy tool for arranging and categorizing various marine macroalgae species. It has long been utilized by algae researchers and is still employed in the study of marine macroalgae today. If you wish to learn more about Littler and Littler's morphological categorization of marine macroalgae, you may look at the original paper or additional research that has utilized or referenced their classification system.