Sarcophyton glaucum
A soft coral from the Red Sea to the western Pacific.
Sarcophyton glaucum, called toadstool leather coral or rough leather coral, is a soft coral species that lives from the Red Sea to the western Pacific Ocean. It is part of the phylum Cnidaria, class Anthozoa, and family Alcyoniidae. This coral is especially common in the Red Sea, where it ranks among the most abundant soft corals in its family. Soft corals like this one lack a hard exoskeleton; they are sessile and are identified by the calcareous sclerites on their surfaces. The polyps of Sarcophyton have eight tentacles. These corals form monospecific colonies and are usually found in intertidal, subtidal, and near-shore reef flat habitats. Individual corals can grow up to 80 cm and typically live on reef flats, in lagoons, or on seaward slopes. The rough leather coral hosts many microorganisms that protect it from pathogens and may also supply nutrients. Sarcophyton corals are frequently used in pharmaceutical research. S. glaucum produces sarcophytol A, a diterpenoid with tumor-inhibiting bioactivity, and its cembranoids also show tumor-inhibiting effects. Its metabolites have demonstrated antimicrobial, antifungal, and neuroprotective properties. One study concluded that several compounds isolated from this coral could be further investigated for cancer research and treatment. Other research has found antibacterial properties in the bacteria associated with S. glaucum, including bacteria from the phyla Firmicutes, Gamma proteobacteria, and Actinobacteria. Chemical analyses of 16 Sarcophyton species revealed a range of biological activities, and the terpenes in this genus protect against insects, pests, inflammation, viruses, and biofouling. S. glaucum is also important in aquaculture. It can be divided into six clades based on mitochondrial protein sequences. A study on the effects of light intensity found that S. glaucum can grow and survive under low Photosynthetically Active Radiation (PAR) levels. Low PAR did not negatively affect its photobiology, and the concentration of its endosymbionts actually increased under those conditions, suggesting that low light can be used for ex situ culturing.
Quick Facts
- Taxon
- Sarcophyton glaucum
Facts from the source article.
Lore & Background
Sarcophyton glaucum, also called toadstool leather coral or rough leather coral, is a soft coral that lacks a hard exoskeleton. It is sessile and identified by calcareous sclerites on its exoskeleton. Its polyps have eight tentacles. Individual corals grow up to 80 cm and typically form monospecific colonies. Its range extends from the Red Sea to the western Pacific Ocean. It is found in a variety of habitats including intertidal zones, subtidal areas, near-shore reef flats, lagoons, and seaward slopes. In the Red Sea, it is one of the most prevalent soft corals of the family Alcyoniidae. S. glaucum hosts many microorganisms that protect it against pathogens and may supply nutrients. It is a producer of sarcophytol A, a diterpenoid with tumor-inhibiting bioactivity. Its metabolites have shown antimicrobial, antifungal, and neuroprotective properties. The species can be separated into six clades based on mitochondrial protein sequences.
Reader's Guide
Sarcophyton glaucum is a soft coral of the family Alcyoniidae, one of seven known genera in that family. It does not have a hard exoskeleton and is sessile, building monospecific colonies in intertidal, subtidal, and near-shore reef flat habitats, as well as lagoons and seaward slopes. The coral hosts diverse microorganisms that provide benefits such as protection against pathogens and possible nutrient supply. In the reef ecosystem, S. glaucum is a source of bioactive compounds, including sarcophytol A and other cembranoids, which have been studied for tumor-inhibiting, antimicrobial, antifungal, and neuroprotective properties. Bacteria associated with S. glaucum, including those from the phyla Firmicutes, Gamma proteobacteria, and Actinobacteria, have shown antimicrobial activity. The species is also used in aquaculture; research indicates that S. glaucum can grow and survive under low Photosynthetically Active Radiation (PAR) intensities, with increased concentrations of coral endosymbionts under such conditions, suggesting low PAR can be used for ex situ culturing.
Frequently Asked Questions
What is Sarcophyton glaucum?
It is a soft coral species commonly known as toadstool leather coral or rough leather coral, classified in the family Alcyoniidae under the class Anthozoa. Unlike stony corals, it has no hard exoskeleton and remains sessile, anchored to the reef substrate.
Where does Sarcophyton glaucum naturally occur?
Its range spans from the Red Sea eastward to the western Pacific Ocean. It is typically found in intertidal zones, subtidal areas, near-shore reef flats, lagoons, and seaward slopes.
How large can a Sarcophyton glaucum colony grow?
Colonies can reach a maximum size of roughly 80 cm (about 31 inches). Each colony is monospecific, meaning it is composed entirely of a single species.
What are the key identifying features of Sarcophyton glaucum?
Each polyp bears exactly eight tentacles, and the coral's surface is covered with calcareous sclerites used for identification. It lacks a rigid skeleton, which sets it apart from hard corals.
Why is Sarcophyton glaucum notable in reef communities?
In the Red Sea it ranks among the most abundant soft corals within its family, making it a major contributor to local reef structure and biodiversity. Its broad distribution across the Red Sea to the western Pacific further highlights its ecological reach.
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