Metallic Green Octospawn Coral

Placement, Lighting & Flow

Octospawn Coral (Fimbriaphyllia yaeyamaensis) performs well under moderate reef lighting, with a PAR range of approximately 50–150 providing a suitable starting point for most specimens. Lower to middle rockwork is generally ideal, although final placement should always take the lighting intensity and flow pattern of the individual aquarium into account.

Provide moderate, indirect and preferably variable water movement. The fleshy tentacles should move freely and gently rather than being continuously pushed in one direction. Strong direct flow can prevent full expansion and may cause the soft tissue to rub against the sharp underlying skeleton.

When introducing a newly acquired specimen, begin in slightly reduced lighting and increase exposure gradually if necessary. This is particularly important when moving a coral between aquariums using different lighting technologies, spectra or intensities.

Feeding & Nutrition

Octospawn Corals are photosynthetic and receive much of their energy from their symbiotic algae, so regular target feeding is not essential. Supplemental feeding is nevertheless beneficial and may support growth, tissue condition and recovery.

Small amounts of appropriately sized food can be offered once or twice per week. Suitable foods include mysis shrimp, enriched brine shrimp, finely chopped marine foods and small LPS coral pellets. Feed only when the coral is receptive and avoid placing oversized food directly onto the delicate tissue.

Overfeeding is unnecessary and can contribute to nutrient accumulation and deteriorating water quality. Consistent aquarium conditions remain more important than heavy feeding.

Compatibility & Spacing

Octospawn Corals are aggressive LPS corals and should be given adequate clearance from neighbouring species. Their tentacles can sting nearby corals, and extension may increase after dark or when food is present in the water.

Allow generous space around the colony for both current expansion and future growth. Avoid placing Octospawn immediately beside peaceful corals or species with delicate tissue.

Corals traditionally grouped together as “Euphyllia” should not automatically be assumed to be compatible on contact. Hammer, Frogspawn, Octospawn and Torch Corals can behave differently towards one another, and direct tissue contact should be avoided unless compatibility between the particular colonies has been established.

Growth & Behaviour

Fimbriaphyllia yaeyamaensis develops a branching skeleton, with individual fleshy heads growing from separate skeletal branches. New heads gradually form as the colony matures, creating a denser and increasingly impressive structure.

Growth is generally moderate under stable conditions. Healthy specimens typically display good daytime expansion, with soft multi-tipped tentacles moving continuously in the surrounding current.

Temporary contraction can occur following feeding, handling, transport or changes in lighting and water movement. Persistent retraction, however, should prompt closer inspection of aquarium conditions.

Acclimation & Introduction

After transport, place the coral in moderate indirect flow and avoid immediately exposing it to the brightest area of the aquarium. Allow the tissue to expand and the coral to settle before making further adjustments to its final position.

Inspect all new specimens carefully before introduction. Examine the tissue margins, exposed skeleton and frag plug for physical damage, unwanted algae, pests or signs of infection. A suitable coral dip and separate observation or quarantine period can reduce the risk of introducing problems into the main display.

Once the coral is consistently expanding and responding normally, avoid repeatedly moving it unless there is a clear reason to change its position.

Common Problems & Prevention

Like other fleshy Euphylliid-type LPS corals, Octospawn can be vulnerable to tissue damage, rapid tissue recession and bacterial or brown jelly-like infections following stress or injury.

Avoid strong direct flow, abrasion against rockwork and unnecessary handling. The expanded tissue can extend well beyond the visible skeleton and is easily torn against sharp skeletal edges.

Stable salinity, temperature and water chemistry are important. Sudden environmental changes can lead to prolonged retraction, loss of tissue inflation or recession. Damaged or deteriorating heads should be inspected promptly because tissue loss can sometimes progress quickly through a colony.

Signs of Stress

Temporary retraction following transport or disturbance is normal. Persistent contraction, poor tissue inflation, bleaching, unusual darkening, exposed skeleton, excessive mucus or visible tissue recession indicate that the coral should be investigated.

Check lighting and flow first, followed by salinity, temperature and general aquarium stability. Avoid repeatedly changing several parameters at once, as stable conditions are particularly important for recovery.

Handling & Fragging

Handle Octospawn by the frag plug or exposed skeleton whenever possible and avoid touching or compressing the fleshy polyps. When fully expanded, the living tissue can extend considerably beyond the skeletal branch beneath it.

Branching colonies can be propagated by cutting individual skeletal branches well below the living tissue. Use clean, suitable coral-cutting equipment and only frag healthy colonies. Newly cut specimens should be kept under stable conditions with moderate indirect flow while they recover.

Wear gloves and eye protection when handling or fragging corals and clean equipment between colonies to reduce the risk of transferring contaminants or pathogens.

Who Is This Coral Best Suited For?

Octospawn Coral is best suited to intermediate reef keepers who can provide stable water conditions, moderate lighting, gentle-to-moderate variable flow and sufficient space from neighbouring corals. Its dense texture, strong fluorescence and constant movement make it particularly effective as a feature coral in mixed reefs and LPS-focused aquariums.