Common name: Scroll Algae

General information

Dichotomaria marginata, commonly known as Scroll Algae or Calcified Red Algae, is a species of calcareous marine algae that is often found in reef aquariums. It is appreciated for its unique, ornate appearance, resembling scrolls or ribbons, which adds a natural and aesthetically pleasing element to the tank. This algae is part of the Rhodophyta phylum, which is known for its ability to calcify, or harden, its cell walls with calcium carbonate. This process gives the algae a rigid structure and helps it withstand various environmental conditions.

Care

Scroll Algae requires moderate to high lighting to thrive in an aquarium setting. It prefers strong water movement to mimic its natural habitat, where it is often subjected to waves and currents. This algae is not particularly demanding regarding nutrients, but it does benefit from stable calcium levels, as calcium is essential for its growth and calcification. It is generally considered a good choice for hobbyists who want to add a touch of diversity to their reef tanks without the need for intensive care.

Symbiosis

While Dichotomaria marginata does not have any well-known symbiotic relationships like those seen in anemones or corals, it can provide microhabitats for small invertebrates and fish. Its structure offers shelter and a surface for various organisms to graze on, contributing to the overall biodiversity of the aquarium.

Habitat

Dichotomaria marginata is typically found in shallow, warm waters of the Caribbean and the Gulf of Mexico. It grows on rocky substrates, often in areas with significant water movement. In the wild, it can be found at various depths, usually not exceeding 30 meters, where it forms part of the complex reef ecosystem.