The diagram depicts a red algae, Porphyra. Red algae are marine organisms with the majority of them thriving in warmer areas. They habitat the light receiving regions as well as great depths of oceans where no light is seen. Oogamous sexual reproduction as well as asexual reproduction by non-motile spores are seen in these algae. They store the food material in form of a substance, similar to amylopectin and glycogen in structure, which is floridean starch.