Common name: kanteen

General information

Gelidium corneum, commonly known as Agar Weed, is a species of red algae that is well-known for its role in the production of agar, a gelatinous substance widely used in the food industry and scientific research. In the reefkeeping hobby, it is appreciated for its attractive appearance and the naturalistic touch it adds to the aquarium landscape.

This species is characterized by its stiff, cartilaginous thalli that are typically dark red to almost black in color. It grows in a bushy, branched form and can reach up to 20 centimeters in height. Gelidium corneum is found in intertidal zones and can attach itself to a variety of substrates, including rocks and shells.

Care

Gelidium corneum requires moderate care in the aquarium setting. It thrives in areas with strong water movement and good lighting, which mimic its natural habitat conditions. This red algae prefers cooler water temperatures and can benefit from the addition of trace elements and nutrients to the water.

Regular pruning is recommended to maintain its shape and prevent it from overgrowing other organisms in the tank. It is also important to ensure that it is securely attached to the substrate to prevent it from being dislodged by water currents or the activity of tank inhabitants.

Symbiosis

While Gelidium corneum does not have any specific symbiotic relationships that are of particular interest to reefkeepers, it does contribute to the overall health of the aquarium ecosystem. It provides a natural food source for herbivorous fish and invertebrates and can help with nutrient export by absorbing excess nitrates and phosphates from the water.

Habitat

Gelidium corneum is commonly found in the Atlantic Ocean, from the North American coastline to the shores of Europe and Africa. It inhabits rocky intertidal zones and can be found at various depths, often forming dense mats that provide shelter and food for a variety of marine life.