Common name: purple sea fan

General information

The Purple Sea Fan, known scientifically as Gorgonia ventalina, is a species of soft coral that is popular among reef aquarium enthusiasts for its striking purple coloration and intricate branching structure. Unlike stony corals, sea fans are flexible and sway gently in the water currents, adding a dynamic element to the aquarium.

Care

Caring for Gorgonia ventalina requires moderate to strong water flow to mimic their natural habitat and prevent sediment from settling on their branches. They also need moderate to high lighting to support the photosynthetic symbiotic algae, known as zooxanthellae, that live within their tissues. It's important to maintain stable water quality, with specific attention to calcium and alkalinity levels to support their growth.

Symbiosis

Gorgonia ventalina harbors a symbiotic relationship with zooxanthellae, which are microscopic algae that provide the coral with nutrients through photosynthesis. In return, the coral provides the algae with a protected environment and access to sunlight.

Habitat

The Purple Sea Fan is commonly found in the Western Atlantic, from the Gulf of Mexico and the Caribbean to Bermuda. They typically inhabit reef slopes and flats, often at depths ranging from shallow waters to about 60 feet deep. Their preference for current-exposed areas allows them to capture plankton and organic matter from the water column.