KinStation
Sign inSign up
← Encyclopedia
🐟 AquaticCare difficulty: BeginnerLegal complexity: Low

Cabbage Leather Coral

Sinularia dura · also called Cabbage Coral, Flat Leather Coral, Sinularia Leather, Green Cabbage Leather, Scalloped Leather Coral

⚖️ Compare
Cabbage Leather Coral

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.

Educational only. KinStation content is reviewed by licensed veterinarians but cannot replace an in-person exam. Always consult a licensed veterinarian or board-certified specialist for diagnosis, treatment, or any decision affecting your pet's health.

🩺 Need expert help with your cabbage leather coral?

Connect with a specialist near you or ask a licensed vet — never substitute online guidance for hands-on care in an emergency.

💬 Ask a vet in the community

Quick facts

SizeForms broad, folded ruffled plates 15-30 cm across; large colonies can dominate over 30 cm
Lifespan10–30 years
Social needssolo
Native regionIndo-Pacific reefs, especially Indonesia, the Solomon Islands, Fiji, and the Great Barrier Reef
OriginOld World
Climate🌴 Tropical
Water type🌊 Marine
FamilyAlcyoniidae
GenusSinularia

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.

Anthelia (Waving Hand Polyps)Clove PolypsColt CoralDevil's Hand LeatherFinger leather coralGorgonian Sea FanGreen star polypsKenya tree coralMushroom coralPulsing xeniaSympodium (Blue Clove Polyps)Toadstool leather coralZoanthids

Habitat & space requirements

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 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.

Natural
Green Cabbage Leatherrepresentative

Green Cabbage Leather

CommonBeginner

The widely traded green color form of the cabbage leather: a predominantly green-to-mint colony, often with a maroon body and mint-green polyps, in the lobed cabbage-leaf shape.

Tip: Very forgiving; moderate-to-strong intermittent flow and a range of lighting (T5, LED, or halide) keep it healthy and help maintain color, and it can be placed almost anywhere from low rock to sandbed ledges. Run carbon in mixed reefs since it can chemically suppress sensitive stonies.

Tan/Cream Cabbage Leatherrepresentative

Tan/Cream Cabbage Leather

A neutral tan to cream-colored wild form, slightly hardier-looking and very fast growing.

WWC Neon Cabbage Leatherrepresentative

WWC Neon Cabbage Leather

UncommonBeginner

A bright neon-toned cabbage leather with the classic ruffled, lobed cabbage-leaf form. The neon coloration is far more eye-catching than the everyday tan/brown wild colonies.

Tip: Place low-to-mid on the rockwork in low-to-moderate light (PAR roughly 50-150) and moderate flow; it tolerates a wide range but extends and colors up well under cleaner, brighter light than typical for leathers. Like all Sinularia it periodically retracts polyps and sheds a waxy film over a few days, which is normal.

Neon Green Cabbage Leatherrepresentative

Neon Green Cabbage Leather

UncommonBeginner

A genuinely neon-green color form of the cabbage leather, with the lobed cabbage-leaf growth form that glows under actinic/blue light. Much louder than the standard tan colonies.

Tip: Give it medium light and adaptable, moderate flow; mount on a low ledge where it can spread into its signature folded, cabbage-like sheets without shading neighbors. Expect periodic polyp retraction and waxy shedding, which is a normal self-cleaning process.

Pink Cabbage Leatherrepresentative

Pink Cabbage Leather

UncommonBeginner

A soft, delicate pink color form of the cabbage leather with the same folded, cabbage-leaf morphology. A more pastel look versus the green and neon forms.

Tip: Medium light (around 50-150 PAR) and moderate flow suit it; it is forgiving on placement, so site it where the pink pops against green or brown neighbors. Periodic retraction and waxy film shedding over a few days is normal and healthy.

Selectively bred (man-made)
Toxic Green Cabbage Coralrepresentative

Toxic Green Cabbage Coral

CommonBeginner

A vivid green ('toxic') cabbage leather, typically tan-to-brown bodied with strong green coloration and lighter striations developing under good light. Has the ruffled cabbage-leaf shape.

Tip: An easy beginner frag; give moderate-to-high light and moderate-to-strong flow and it will adapt to almost any tank position, spreading into folded sheets over time. Run carbon, as Sinularia release terpenes that can stunt nearby stony corals.

Habitat & enclosure

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.

Sources

  1. Aquarium Corals: Selection, Husbandry, and Natural History (Eric Borneman) (reference book)
  2. Sinularia leather coral care guide — Reef2Reef (web)
  3. World List of Octocorallia (Sinularia, order Malacalcyonacea) — WoRMS (web)