Care guide · Marine · corals

Toadstool leather coral

Sarcophyton

Genus level

Sarcophyton glaucum — an example within this genus guide; traded forms may differ. Photo: Diego Delso · Source · CC BY-SA 4.0Resized and compressed; no cropping or colour changes.

Sarcophyton is a genus of leather corals with a substantial stalk and often broadly expanding cap. Fine polyps extend from its surface when open. A small frag can therefore become a prominent centrepiece in a reef. That future size deserves attention before placement. Many cultured forms are relatively approachable, but differences among species and lines make a genus-level guide more honest than an invented exact identification. Consider shading of neighbours and chemical competition alongside light and flow. Temporary closure while shedding a surface layer can be normal; continuing tissue deterioration needs investigation. This guide helps distinguish the two without immediately treating every closed leather coral.

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At a glance

Identification level: Genus level
Coral group: Soft coral
Difficulty: Easy
Growth and pruning: Moderate
Temperature: 24–26 °C
Specific gravity (SG at 25 °C): 1.025–1.026 SG
pH: 8.1–8.3
Alkalinity: 8–9 °dKH
Calcium: 400–450 mg/L
Magnesium: 1250–1350 mg/L
Light requirement: Low, Moderate
Flow requirement: Moderate
Position: Low, Middle
Aggression: Semi-aggressive
Supplementary feeding: Optional

Water values are reef-care guidance, not proven species limits. PAR describes only the stated culture experience; stability and gradual acclimation remain important.

About this coral

Sarcophyton is an octocoral without a massive stony-coral skeleton. Small calcareous structures in its tissue still contribute to structure and identification. Current taxonomy places the genus in Sarcophytidae. Older care sources may use an earlier family name without describing another animal. Green polyps or a folded cap do not prove an exact species. The genus illustration cannot justify assigning identical numbers to every similar-looking form.

Natural habitat

These leather corals occur on tropical Indo-Pacific reefs. A broad upper surface uses space and light, but local conditions are not identical. A cultured frag also brings its recent care history. Ask about the parent colony's lighting and flow. Translate that into a firm base, movement across the cap and surrounding clearance, not one natural depth converted into a universal aquarium height.

Aquarium and layout

Plan for the mature cap before fixing a small frag. A central site may look attractive but makes future shading of lower animals more likely. Choose a holder that supports its weight and remains accessible. Avoid permanent rubbing against glass or rock. No universal minimum volume is defensible for the genus; colony size, growth and clearance vary too much. Manageability matters more than fitting today's frag into a gap.

Water conditions

Even a relatively robust leather coral needs stable marine conditions. Monitor salinity, temperature and nutrient trends rather than using its resilience to excuse accumulating waste. Calcium and alkalinity are managed for the entire reef according to measured consumption, not one supplement bottle per species. No hard nitrate or phosphate tolerances are invented for this broad genus. Measurement trends are more useful than one isolated reading.

Lighting and acclimation

Many cultured toadstools grow under low to moderate light, but the genus contains more variation than one trade form. No universal PAR range is established. Start from known previous conditions and acclimate gradually. Measure at the cap, whose growth can change exposure. Temporary retraction does not automatically call for brighter light. Consider shedding, flow and tankmate disturbance before adjusting the lamp.

Water movement

Moderate indirect movement across the cap helps remove debris and shed surface material. A hard permanent jet on one edge is different and may impede opening. Circulation matters around a closed shiny cap, but do not scrape or pull the layer from living tissue. Check movement behind large colonies too; a growing cap can redirect flow elsewhere in the reef.

Feeding

Photosynthetic symbionts provide important nutrition. Some forms may also use small suspended particles, but large meat pieces do not suit fine polyps. A general Sarcophyton claim does not justify a mandatory food product. Evaluate application and prevent extra food mainly becoming waste. Normal tankmate feeding in a functioning system does not automatically require amino acids or a daily coral-powder cloud.

Growth and behaviour

Stalk and cap can become much larger than the original frag. Expansion changes light and local flow throughout that reef area. Take overview photographs and watch neighbours gradually losing room. A folded cap is not inherently a problem, but contact with glass or corals needs adjustment. A fixed genus-wide growth rate is unjustified. Plan maintenance before removal requires major reconstruction.

Aggression and spacing

Chemical competition matters alongside physical contact in mixed reefs. A broad gap does not automatically prevent interactions through water. Avoid crowding sensitive stony corals and keep the cap out of their light path. Water changes and suitable system management matter; activated carbon is a targeted management possibility, not a guarantee for a poor pairing. No exact distance summarises all these risks.

Keeping with fish

Dwarf angelfish and other nipping fish may repeatedly disturb polyps. A clownfish occupying the cap may also bother a small colony without removing large tissue pieces. Observe whether closure coincides with contact. A reef-safe label is no individual guarantee. Open-water fish with different feeding behaviour require a different assessment from polyp pickers. Use concrete relationships and retain a separation option.

Keeping with corals

A leather coral beside Acropora requires more than temperature overlap: shading, different local flow and chemical competition count. Mushroom corals beneath the cap may progressively lose light. Aggressive LPS may injure an edge within tentacle reach. Give colonies distinct zones and assess the future arrangement. A quiet gap between young frags is not lasting compatibility evidence.

Other invertebrates

Marine grazers can cross the base without every contact being harmful, though loose frags may topple. Crabs, shrimp and starfish have varied diets; a group name is insufficient for a reliable match. If closure repeats, observe activity around polyps. Coral-eating animals or infestations need separate identification. Existing freshwater invertebrates are not treated as reef occupants.

Propagation and fragging

Leather corals can be propagated, but cutting causes wounds and mucus release. It is not a necessary first response to an oversized or closed colony. Let an experienced grower assess safe division and attachment of healthy material. Protect hands and eyes and prevent tissue dispersal. Do not glue living tissue. Allow attachment to suitable substrate and monitor water during recovery.

Possible problems

A period without extended polyps can accompany shedding a surface layer. Follow the outcome: reopening differs from ongoing tissue breakdown, a detaching base or persistent damage. Check flow, water, fish and nearby contact. Do not pull off an attached layer or apply arbitrary disinfectants to the reef. Investigate the system if several animals deteriorate; rapid local damage needs experienced assessment.

Keeping with other species

Care products

No sufficiently supported match to a specific existing care product has been established for this coral. Follow the feeding and care chapters; an absent product card does not mean feeding or measurements are unnecessary.

Sources & review

This care guide draws on several specialist sources and was last checked on 9 October 2026.

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