Big Pulsing Xenia Care Guide
Heteroxenia fuscescens is a larger, strongly pulsing relative of Xenia in the family Xeniidae. It is photosynthetic and forms tall, leafy colonies.
Compiled by Aquairi from published sources · Published · Updated
Overview
Heteroxenia fuscescens is a pulsing soft coral of the family Xeniidae, a larger relative of Xenia known for its dramatic pulsing. It forms tall, leafy colonies whose polyps rhythmically open and close their many-fingered hands. Like other Xeniidae it is photosynthetic and can spread quickly under good conditions.
Taxonomy
- Class: Octocorallia
- Family: Xeniidae
- Genus: Heteroxenia
- Scientific name: Heteroxenia fuscescens
- Authority: (Ehrenberg, 1834) (WoRMS, order Malacalcyonacea)
Habitat
The species is associated with Indo-Pacific and Red Sea reefs. As a photosynthetic soft coral it depends on symbiotic zooxanthellae for most of its energy.
Tank requirements
- Temperature: 24–26 °C (75–79 °F)
- pH: 8.1–8.4
- Specific gravity: 1.024–1.026
- Carbonate hardness (dKH): 8–11
- Calcium: 380–450 ppm
- Magnesium: 1280–1350 ppm
- Nitrate: below ~15 ppm; phosphate below ~0.1 ppm
- Lighting: medium, about 75–175 PAR
- Flow: low to moderate, indirect
- Minimum tank age: about 3 months
Moderate light and gentle, indirect flow support strong pulsing; place on rock with room for the colony to develop its tall, leafy form.
Diet
Heteroxenia fuscescens is mainly photosynthetic, obtaining most of its nutrition from zooxanthellae and dissolved nutrients; optional amino acids or phytoplankton may support growth but heavy feeding is not required.
Compatibility
It is reef, fish and shrimp safe and lacks strong stinging tentacles, but as a fast-spreading xeniid it should be given space and managed to prevent it overtaking other corals.
Heteroxenia fuscescens Propagation Guide
Overview
Heteroxenia fuscescens is a soft coral in the family Xeniidae (genus established by Kölliker in 1874). It is a relative of the pulsing Xenia corals and pulsates rhythmically at around forty times a minute, forming tall, leafy colonies. As a xeniid it behaves much like Xenia in captivity and spreads on its own once established.
Reproductive Mode
Propagation in the aquarium is asexual. Like other xeniids, the coral extends onto adjacent surfaces, attaches where it touches, and daughter stalks can separate from the parent to form independent colonies, giving the steady self-spread typical of the family.
Fragging / Asexual Propagation
To frag, snip a stalk near its base with sharp scissors or a clean blade and band the cutting loosely to a plug or rock; it attaches by itself over roughly one to two weeks. As with related pulsing corals, securing the frag to a small piece of rock gives a more reliable hold than bare glue.
- Snip a stalk near the base with sharp scissors.
- Band the cutting loosely to a plug or rock.
- Keep it in low flow and undisturbed.
- It self-attaches over about one to two weeks.
Conditions for Propagation
Low flow and stable, established water support attachment and pulsing. Because the colony spreads readily, starting it on an isolated rock makes it easy to contain and remove material when pruning.
Common Challenges
The principal difficulty is the same as with Xenia: rapid spread onto surrounding rock and corals. Regular trimming and physical isolation keep the colony manageable.