Common name: Green Felt Algae

General information

Codium vermilara, commonly known as Green Felt Algae, Codium Algae, or Dead Man's Fingers, is a distinctive green macroalgae that is popular among marine aquarists. It has a spongy texture and a branching, tree-like structure that can add a unique aesthetic to any reef tank. This species is not only valued for its appearance but also for its role in nutrient export, as it can absorb excess nutrients like nitrates and phosphates from the water column.

Care

Codium vermilara is relatively easy to care for, thriving in a range of lighting conditions from moderate to high. It prefers strong water movement to mimic its natural habitat and to prevent detritus from settling on its surfaces. This algae can be easily attached to live rock or substrate using a rubber band or a safe, reef-friendly glue. It's important to monitor nutrient levels, as this algae can deplete them, potentially starving other photosynthetic organisms in the tank.

Symbiosis

While Codium vermilara does not have the same kind of symbiotic relationships with fish or invertebrates as some corals and anemones do, it can provide a habitat for small microfauna. These tiny creatures, such as copepods and amphipods, can use the algae as a refuge and breeding ground, which in turn can serve as a natural food source for fish and other inhabitants of the reef aquarium.

Habitat

Codium vermilara is found in a variety of marine environments, from intertidal zones to subtidal areas. It is often seen attached to rocks, coral rubble, or other hard substrates. In the wild, it can be found in both shallow and deeper waters, where it forms part of the complex structure of the reef ecosystem.