Common name: Warty gracilaria

General information

Gracilaria gracilis, commonly known as Red Bush Algae or simply Gracilaria, is a species of red macroalgae that is popular among reef aquarium hobbyists for its attractive appearance and utility in nutrient export. This algae is known for its bushy, branching structure and its deep red to burgundy coloration, which can add a natural and vibrant touch to any marine aquarium.

Care

Gracilaria gracilis is relatively easy to cultivate in a reef aquarium, provided it receives moderate to high lighting and some water flow. It is not particularly demanding in terms of nutrients, but it does benefit from the presence of nitrate and phosphate in the water, which it absorbs as part of its growth process. Regular pruning is recommended to maintain its shape and to prevent it from overshadowing other inhabitants of the tank.

Symbiosis

While Gracilaria gracilis does not have any specific symbiotic relationships with animals, it serves an important role in the aquarium by providing a natural form of nutrient control. It competes with nuisance algae for resources, thereby helping to keep the tank clean and balanced. Additionally, it can serve as a habitat and food source for small invertebrates and herbivorous fish.

Habitat

In the wild, Gracilaria gracilis is found in a variety of marine environments, from shallow waters to depths of several meters. It is commonly seen attached to rocks, coral rubble, or other hard substrates where it can receive ample sunlight for photosynthesis. This species is distributed in temperate and tropical seas worldwide, demonstrating its adaptability to a range of conditions.