Leather corals are the easiest path into reef-keeping. They tolerate the parameter swings that kill SPS, they don't need expensive lighting, they don't need calcium reactors, and they survive the kind of beginner mistake (a missed water change, a heater stuck on, a brief skimmer crash) that wipes out harder species. Pick a leather, give it reasonable light and flow, and it'll be the first coral you grow into a centerpiece.

This guide covers the four leather coral types you'll see at almost any reef store, what they want, and the most common new-keeper question: "why does my leather coral keep looking dead for a few days at a time?"

What "leather coral" actually means

The leather coral group is a few related genera in the order Alcyonacea (soft corals). They share a leathery, rubbery texture when polyps retract, hence the name. Four genera dominate the trade:

• Sarcophyton (toadstool leather) is the mushroom-shaped corals with a single stalk and a wide top. The most-sold leather in the hobby.
• Sinularia (finger leather, cabbage leather) is the branching, finger-like or lobed corals. Includes the "knobby" leather morphs.
• Lobophytum (devil's hand leather) is similar to Sinularia but with thicker, fused finger lobes. Less common but sometimes labeled interchangeably with Sinularia.
• Cladiella (colt coral) is the smaller, soft, almost translucent branching coral. Often the cheapest leather at the store.

Other "leather-adjacent" softies that come up: Klyxum (close to Cladiella), Lemnalia (tree corals), and Capnella (Kenya tree). These share most of the same care rules.

Lighting

Leathers are among the most light-flexible corals in the hobby. They thrive under everything from cheap T5 fixtures to overpriced LED reef lights, as long as the intensity is somewhere in the middle.

• PAR target: 50-150. Below 50 they slowly starve. Above 200 they bleach. Most LED fixtures running at 40-60% output land in the sweet spot.
• Acclimate slowly. A leather coming from a low-light frag tank into a brightly-lit display will bleach if you skip a 2-3 week ramp-up. Start the new coral lower in the tank, move it up over weeks.
• Color shift. Browner leathers indicate they've added more symbiotic algae (zooxanthellae) and probably need a touch more light. Lighter or yellow-tinted leathers are getting plenty of light. This is normal adaptation, not a problem.

Flow

Moderate flow, indirect rather than direct. Aim a powerhead at the wall behind the coral, not at the coral itself.

• Too little flow: the coral can't shed waste mucus and develops surface infections.
• Too much flow: the coral never fully expands, polyps stay retracted, and over time the colony stunts.

You can tell flow is right when the coral sways gently and polyps extend fully during the day. A leather that won't open after a week of trying is often a flow problem before it's a light problem.

Placement

Leathers produce mild toxins (terpenoids) that suppress competing corals. In a small reef this matters more than in a large one.

• Distance from SPS and LPS: at least 6 inches in a 30-gallon, more in a larger tank. Closer and the harder corals slowly recede.
• Other leathers nearby: generally fine. Toadstools and finger leathers grow next to each other in the wild.
• Avoid placing in the strongest light spot. Mid-tank, mid-flow is the sweet spot.

A heavy carbon presence in the filter helps keep terpenoid concentration down. Most reef setups already run carbon for water clarity; a 4-ounce bag swapped monthly handles a tank with multiple leathers.

Water parameters

Leathers tolerate a wide window:

• Temperature: 75-82°F. Stable matters more than the exact number.
• Salinity: 1.024-1.026.
• pH: 8.0-8.4.
• Alkalinity: 7-11 dKH. Stable beats high.
• Calcium: 380-450 ppm. Lower end is fine, leathers don't build calcium skeleton.
• Magnesium: 1250-1400 ppm.
• Nitrate: 5-20 ppm. Yes, leathers actually like some nitrate. Pristine ultra-low-nutrient tanks (under 1 ppm) starve them.
• Phosphate: 0.03-0.10 ppm. Same idea, slight nutrient presence helps.

If you're chasing the absolute lowest nitrate and phosphate numbers because that's what an SPS-only tank wants, leathers will starve in that water. Stable mid-range parameters beat aggressive nutrient stripping for soft-coral health.

Why a healthy leather looks dead

The first time it happens, every new reefer panics. The leather closes up entirely, polyps stay retracted for 3-7 days, sometimes longer, and the colony looks waxy and gray. It can develop what appears to be a film of dead tissue on the surface.

This is shedding. Leathers periodically slough off their outer cuticle to remove algae, bacteria, and accumulated mulm. Underneath, the coral is fine. The wax-like film falls off after a few days and the coral re-opens with fresh tissue.

Signs that it's normal shedding:

• Coral was healthy before.
• Closed-up period lasts under 2 weeks.
• The shed comes off in a continuous skin-like sheet.
• Other tank inhabitants are fine.

Signs that something is wrong:

• Closed period passes 3+ weeks.
• The base or stalk looks soft, discolored, or weeping.
• A specific spot is rotting outward in a circular pattern.
• Tissue starts pulling away from the skeleton.

The fix for normal shedding is to leave it alone. The fix for actual disease is to remove the rotting portion with reef-safe scissors, dip the coral in a coral dip (Coral RX, ReVive, Bayer), and put it back.

Picking your first leather

The easiest entry-level leather in the hobby is a green or yellow toadstool. They're hardy, they're cheap, and they look great as a small frag and as a 12-inch centerpiece colony.

Second-best is a brown or green Sinularia "cabbage" leather. Almost as hardy, propagates by dropping branches you can re-attach to plugs, and gives you free coral for trade or sale.

Avoid as a first leather:

• Devil's hand (Lobophytum) until you're comfortable with toadstools. Looks similar but is slightly more demanding on flow and nutrient levels.
• Yellow finger leather (Sinularia flexibilis "yellow"). Beautiful but bleaches faster than typical green or brown morphs.

Propagation

Leathers are some of the easiest corals to frag. Cut a section of a healthy colony with sharp reef scissors, rubber-band or super-glue the frag to a plug, and the frag will close up for a week or two and then re-open as a new colony. Within 6-12 months you can have a frag pile worth trading at your local reef club.

For toadstools specifically, the head can be cut from the stalk; both pieces will regenerate. The original stalk grows a new head within months.

The leather coral progression

A reasonable first year for a beginner reef:

1. Cycle the tank (4-8 weeks).
2. Add a single toadstool leather, give it a month to settle.
3. Add a Sinularia, a Cladiella, and maybe a Kenya tree.
4. After 4-6 months of stable parameters, look at zoanthids, mushrooms, and easy LPS like hammer and frogspawn.
5. SPS comes later, after a year of reliable water chemistry.

Use the Tank Builder to plan the reef stocking and flag water-parameter or compatibility issues before you commit. Leathers tolerate most fish, but the builder will catch the few exceptions (some angels and butterflies will pick at them).

Leathers are the corals that taught most experienced reefers what a healthy soft coral looks like. They're forgiving, they grow, and they survive your mistakes. Start here.