Common name: Green Hair Algae

General information

Cladophora herpestica, commonly known as Green Hair Algae, is a species of filamentous algae that can be found in marine aquariums. While often considered a nuisance due to its rapid growth and ability to overtake other organisms, it can also serve as a natural form of nutrient export and habitat for small invertebrates when kept in check.

Care

Managing Green Hair Algae in an aquarium setting involves maintaining good water quality, adequate flow, and nutrient control. Regular removal during tank maintenance is recommended to prevent it from becoming invasive. Some aquarists intentionally cultivate small amounts of this algae in refugiums to absorb excess nutrients and provide a grazing area for herbivorous fish and invertebrates.

Symbiosis

In the wild, Cladophora herpestica may host a variety of microfauna, including amphipods and copepods, which are beneficial for natural food chains in the aquarium. However, in the main display tank, it is generally not encouraged to let this algae grow extensively as it can outcompete corals and other desirable algae species.

Habitat

Cladophora herpestica is adaptable and can be found in a range of marine environments. In the aquarium, it tends to grow in areas with high nutrients and light, often on live rock or aquarium equipment.