Common name: angular sea whip

General information

The Purple Sea Blade, or Purple Sea Whip, scientifically known as Pterogorgia anceps, is a species of gorgonian coral that is quite popular among reef aquarium enthusiasts. This coral is known for its unique, flat, blade-like branches that are typically purple in color, although they can also be found in shades of brown or green. The polyps of Pterogorgia anceps are white and extend from the edges of the branches, giving the coral a feathery appearance when fully expanded.

Care

Pterogorgia anceps requires moderate to high lighting conditions to thrive in a reef aquarium. It is photosynthetic and relies on the symbiotic algae, zooxanthellae, living within its tissue for nutrition. However, supplemental feeding with planktonic foods can benefit its growth and health. Strong water movement is also essential to keep the polyps free of debris and to facilitate feeding and gas exchange.

Symbiosis

While Pterogorgia anceps does not have any widely known symbiotic relationships like those seen in clownfish and anemones, its structure provides a habitat for a variety of small reef organisms. These can include small fish seeking shelter or invertebrates that may settle on its branches.

Habitat

Pterogorgia anceps is commonly found in the Caribbean Sea and the Gulf of Mexico. It prefers reef slopes and back reef environments where it can be exposed to strong currents. This coral is typically found at depths ranging from shallow waters to about 30 meters deep.