A vigorous, fast-growing leather coral that forms ruffled, cabbage-like folds and is exceptionally tolerant of beginner mistakes. Its thick tissue is reinforced with calcareous sclerites, making it tougher and more resilient than most soft corals.
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Forms broad, folded ruffled plates 15-30 cm across; large colonies can dominate over 30 cm
Lifespan
10–30 years
Social needs
solo
Native region
Indo-Pacific reefs, especially Indonesia, the Solomon Islands, Fiji, and the Great Barrier Reef
Origin
Old World
Climate
🌴 Tropical
Water type
🌊 Marine
Family
Alcyoniidae
Genus
Sinularia
Part of the Soft Corals
Soft corals such as leathers, colt, cloves, Anthelia, gorgonians and Sympodium. Non-skeletal octocorals with flexible, often swaying colonies and eight-tentacled polyps; mostly hardy, beginner-friendly reef corals driven by photosynthesis and tolerant of a wide range of light, flow and nutrients.
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
Photo coming soon
Minimum
Stable nano reef
10+ gal / SG 1.025 / Alk 8-9 dKH / NO3 5-15 ppm
Hardy soft coral — fine in a stable nano reef with low–medium light and gentle flow. Place low/mid; tolerates higher nutrients than SPS. Cabbage leather (Sinularia / Sarcophyton-related) — large fleshy lobed coral; sheds wax periodically — normal.
Photo coming soon
Recommended
Established 30-gal reef
30+ gal / cycled 6+ mo / Alk 8-9 / Ca 420-440
Established 30+ gal reef with stable lighting + mid flow. Photosynthetic; no target feeding required. Frag-friendly — grows fast.
Photo coming soon
Ideal
Mature mixed reef
75+ gal / show-quality stability
Mature 75+ gal mixed reef. Tolerant species like this can compete chemically with neighbours (e.g. xenia, GSP spread fast) — give space or contain on isolated rock. Cabbage leather (Sinularia / Sarcophyton-related) — large fleshy lobed coral; sheds wax periodically — normal.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Photo coming soon
Planula larva
Corals begin as a free-swimming planula larva released into the water column after spawning or brooding. The tiny, ciliated larva drifts and swims until it finds suitable hard substrate to settle on.
Photo coming soon
Single polyp
Once settled, the larva metamorphoses into a single founding polyp that secretes a calcium-carbonate (or proteinaceous) base and extends a ring of tentacles to feed. Reef-building corals begin laying down skeleton at this stage.
Mature colony
The founding polyp buds asexually into a colony of many genetically identical polyps, building the species' characteristic growth form — branching, plating, encrusting, or massive. A mature colony can reproduce and contributes to reef structure.
Color & pattern variants
Natural variants occur in the wild; selectively bred (man-made) variants were developed in captivity.
Suited to an established reef of 110 L (30 gal) or larger; give it room to expand. Maintain salinity 1.024-1.026 SG, temperature 24-27 C (75-81 F), pH 8.1-8.4, alkalinity 8-11 dKH, calcium 400-450 ppm, magnesium 1250-1350 ppm. It accepts moderate nutrients (nitrate ~5-20 ppm) and does poorly under extremely sterile, carbon-dosed conditions. Place it low to mid where it has open space, as it grows quickly and shades neighbors.
Substrate
Attach to live rock or a frag plug rather than sand; it fuses its leathery base firmly to hard surfaces. Use reef-safe super glue gel or band a frag down until attached. Keep the base off the sand bed to prevent trapped detritus and necrosis.
Equipment & setup
Give moderate to moderately-strong, turbulent flow to slough off mucus and prevent algae on its surface. Moderate lighting around 50-150 PAR suits it; it adapts to LED or T5 and should be light-acclimated gradually. Run a skimmer and activated carbon to export its toxins, plus standard reef heating and stable salinity.
Diet
Primarily photosynthetic through zooxanthellae and gains most nutrition from light. It supplements by absorbing dissolved organic matter and capturing very fine particulates; light broadcast feeding of phytoplankton or coral amino acids boosts growth. Meaty target feeding is unnecessary because its polyps are small.
Behavior & temperament
Peaceful with no sweeper tentacles, but strongly allelopathic — Sinularia is one of the more chemically aggressive leathers, releasing terpenes that can stunt or kill nearby SPS and other stony corals. It regularly closes and sheds a waxy film as it cleans itself, looking deflated for a day or two. Not a handleable animal; handle only for fragging and wear gloves to avoid mucus irritation.
Health
Robust and rarely ill. Watch for base rot if detritus collects under the colony, brown jelly following physical damage, and persistent closure from unstable alkalinity or chemical irritation. Heavy activated carbon counters the allelochemicals it sheds into the water. Rapid tissue recession is usually traceable to a parameter swing or aggressive tankmate.
Tips, DIY & hacks
It frags extremely easily — cut a fold, glue or band it to a plug, and you will have a new colony within days. If it sulks closed for over a week, improve turbulent flow and swap carbon to clear shed-film chemicals. Maintain a generous buffer zone from Acropora and other SPS. Prune it back periodically so it does not overgrow the rockwork; trimmings frag readily.