Common name: Branching Frogspawn Coral

General information

Australogyra zelli, commonly known as the Branching Frogspawn Coral or Octospawn, is a species of large polyp stony coral (LPS) that is popular among reef aquarium enthusiasts for its unique appearance and movement. The coral's polyps resemble frogspawn, with long tentacles that can extend and retract, giving it a dynamic presence in the aquarium. This species is known for its branching growth form, which can create an impressive display as it matures.

Care

The Branching Frogspawn Coral requires moderate to high lighting conditions to thrive, as well as moderate water flow to help keep its tentacles free from debris and to facilitate feeding. It is important to provide ample space between this coral and other tank inhabitants, as it can be aggressive and extend its sweeper tentacles to sting neighboring corals. Regular feeding with planktonic foods and trace elements will support its growth and maintain its vibrant coloration.

Symbiosis

While not known for hosting fish like some anemones, the Branching Frogspawn Coral can have a mutualistic relationship with certain cleaner shrimp and small fish that may seek refuge among its tentacles. These creatures can help keep the coral free from parasites and provide it with additional nutrients through their waste.

Habitat

Australogyra zelli is found in the Indo-Pacific region, typically in reef slopes and lagoons where it can anchor itself to the substrate. It is often seen at various depths, usually within the range where light penetration is sufficient for its symbiotic zooxanthellae to photosynthesize and provide the coral with energy.