Common name: Ogo

General information

Gracilaria salicornia, commonly known as Ogo, Gozo, or Hawaiian Ogo, is a species of red algae that is popular in the marine aquarium trade for its utility and ease of care. This algae is not only appreciated for its aesthetic contribution to the tank but also for its role in nutrient export and as a natural food source for herbivorous fish and invertebrates.

In the wild, it is found in shallow, warm waters and often forms dense, branching structures that can resemble small cacti. Its color can range from deep green to reddish-brown, depending on the conditions it is grown in.

Care

Ogo is a hardy species that can thrive in a variety of tank conditions. It prefers moderate to high lighting and some water flow to mimic its natural habitat. It can be easily propagated by fragmentation, making it an excellent choice for aquarists looking to cultivate their own live foods or refugiums.

Regular pruning is recommended to maintain its shape and promote growth. It is also important to monitor nutrient levels, as Ogo can absorb significant amounts of nitrate and phosphate, helping to control algae growth and improve water quality.

Symbiosis

While Gracilaria salicornia does not have any specific symbiotic relationships in the aquarium, it serves as a habitat and feeding ground for a variety of small invertebrates and fish. It can also be used in refugiums where it provides shelter and nourishment for copepods and amphipods, which are beneficial for natural food chains in the aquarium.

Habitat

Gracilaria salicornia is native to the Indo-Pacific region, including the Hawaiian Islands, where it grows in intertidal zones and shallow reefs. It is adaptable to a range of depths and can be found in both sandy and rocky substrates.