Hologram Branching Hammer Coral

Placement, Lighting & Flow

Branching Hammer Coral (Fimbriaphyllia paraancora) performs best under moderate reef lighting. A PAR range of approximately 75–200 provides a practical working range, with lower to middle rockwork generally offering suitable placement.

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

When introducing a new specimen, begin conservatively with lighting and increase exposure gradually if required. Even a healthy Hammer Coral can react poorly to a sudden change in lighting spectrum or intensity between systems.

Feeding & Nutrition

Branching Hammer Corals are photosynthetic and receive most of their energy from their symbiotic algae, so regular target feeding is not essential. Supplemental feeding is nevertheless beneficial and can support stronger tissue condition and faster growth.

Small amounts of suitably sized food can be offered once or twice per week. Appropriate foods include mysis shrimp, enriched brine shrimp, finely chopped marine foods and small LPS coral pellets.

Offer food when the coral is receptive and avoid placing oversized pieces directly onto the polyps. Hammer Corals can also capture suspended food from the water column, so heavy target feeding is unnecessary.

Compatibility & Spacing

Branching Hammer Corals are aggressive LPS corals and can extend sweeper tentacles capable of stinging neighbouring species. Allow generous clearance around the colony for both normal daytime expansion and longer nighttime sweepers.

Hammer and Frogspawn Corals can sometimes tolerate closer placement than unrelated LPS species, but compatibility should not automatically be assumed. Monitor neighbouring colonies carefully and prevent repeated tissue contact if either coral shows irritation.

Torch Corals should be given considerably more separation. Their longer and more powerful tentacles can cause serious damage to Hammer Corals, even when both have historically been grouped under the broader “Euphyllia” name.

Growth & Behaviour

Fimbriaphyllia paraancora has a branching growth form, with individual fleshy polyps developing on separate skeletal branches. New heads form through budding and splitting, gradually creating a denser and larger colony.

Branching Hammer Corals generally grow faster than wall-forming Hammer varieties and can become substantial colonies under stable conditions. Their separated skeletal branches also make established colonies considerably easier to propagate.

Healthy specimens normally show significant daytime expansion and gentle, fluid movement of the polyps. Temporary retraction following transport, feeding or disturbance is normal, but persistent contraction should prompt closer inspection.

Acclimation & Introduction

Following transport, place the coral in a sheltered position with moderate lighting and gentle indirect flow. Allow the polyps time to expand and the coral to adjust before deciding whether a different permanent position is necessary.

Inspect the coral carefully before introduction, paying particular attention to the fleshy tissue around the base of each head and the exposed skeletal branches. Look for tissue recession, physical damage, unwanted algae, pests or abnormal mucus.

A separate observation or quarantine period is ideal. Coral dips should be used carefully with fleshy Hammer Corals, as unnecessary treatment immediately after transport can add further stress to an already weakened specimen.

Common Problems & Prevention

Branching Hammer Corals can suffer from tissue recession, physical injury and bacterial or brown jelly-like tissue breakdown, particularly following transport stress, unstable aquarium conditions or damage to the fleshy tissue.

Strong direct water movement, contact with sharp rockwork and stings from neighbouring corals should be avoided. A healthy specimen should retain a substantial band of living tissue extending down around the skeletal branch beneath each polyp.

Euphylliid-eating flatworms and other unwanted organisms may also affect Hammer Corals. Regular inspection of both the polyps and exposed skeleton is important, particularly when introducing new specimens to an established collection.

Signs of Stress

Temporary retraction after transport, handling or feeding is normal. Persistent contraction, poor tissue inflation, bleaching, unusual darkening, excessive mucus, exposed skeleton or tissue visibly receding from the skeletal branch indicate that the coral should be investigated.

Check lighting and flow first, followed by temperature, salinity and overall aquarium stability. Very thin or unusually stretched polyps may also indicate that the coral is receiving inadequate light or nutrition.

Avoid making several major changes simultaneously. Stable conditions and identifying the underlying cause are preferable to repeatedly relocating or adjusting a stressed Hammer Coral.

Handling & Fragging

Handle the coral by the exposed skeleton or mounting base whenever possible and avoid touching or compressing the fleshy polyps. The living tissue can extend well beyond the skeleton when fully expanded and can be easily torn.

One major advantage of the branching growth form is that established colonies can usually be propagated without cutting through living tissue. Individual branches can be separated below the fleshy tissue using clean coral cutters or a suitable coral saw.

Only healthy, established colonies should be fragged. Use clean equipment, wear gloves and eye protection, and allow freshly separated heads to recover under stable conditions with gentle indirect flow.

Who Is This Coral Best Suited For?

Branching Hammer Coral is well suited to intermediate reef keepers looking for a colourful, relatively hardy LPS coral with strong movement and good growth potential. Its branching structure, broad range of colour forms and ability to develop multiple heads make it particularly suitable for mixed reefs and dedicated LPS displays.