Mushroom Coral

Mushroom Coral key facts

Care level

Beginner-friendly

Lifespan

10+ years with proper care

Size

Individual 3-10cm

Temperature

24〜27℃

Diet

Photosynthesis + trace liquid food

Lighting

Grows well under low to moderate lighting (50-200 PAR). Strong light is unnecessary; a slightly shaded spot in the lower tank suits it.

Flow & Placement

Prefers gentle flow. Direct strong current makes it shrink and open poorly, so place it in a calm spot away from pump outlets.

Water Temperature & Quality

Keep the water at 24-27C. It is sensitive to sudden water changes, so do water changes and dosing in small steps to keep parameters stable.

Diet & Feeding

It relies mainly on photosynthesis, but regular feeding of frozen brine shrimp, daphnia or a small amount of liquid food promotes growth.

Notes

Shrinks under strong light — avoid overexposure

About Mushroom Coral

Disc Coral belongs to the genus Discosoma and is widely distributed across tropical and subtropical reef environments throughout the Indo-Pacific. Its defining feature is a flat, disc- or mushroom-cap-shaped body that can grow from a few centimeters to over 15 cm in diameter. The color palette is exceptionally diverse—red, green, blue, purple, and brown morphs all exist, and many display vivid fluorescence that enlivens any reef tank. Being soft-bodied and skeleton-free, Disc Coral is somewhat sensitive to strong direct flow or physical contact, yet it tolerates a broad range of lighting intensities and shows reasonable resilience to moderate parameter fluctuations. It relies primarily on symbiotic zooxanthellae for nutrition, reducing the need for frequent supplemental feeding. Propagation through natural splitting or deliberate cutting is straightforward, opening the door to collection building and trades within the hobby. Low care requirements combined with long potential lifespan make Disc Coral an ideal starting point for anyone entering the world of reef-keeping.

7 things to know before welcoming a Mushroom Coral

1. 1Prefer Low Light

   Disc corals dislike intense light and may bleach or contract when overexposed. Position them at the edges or shaded areas of the tank when using LED lighting. Aiming for a PAR value of roughly 50–150 helps keep them in good condition.

2. 2Gentle Flow Only

   Strong direct flow causes the polyps to contract. Place disc corals where they receive only indirect, gentle circulation. Angling powerheads toward the glass or substrate to diffuse the flow works well.

3. 3Easy to Propagate

   Disc corals multiply on their own through fission, and can also be manually fragged by cutting with a clean blade and securing pieces to live rock. Allow frags to recover in a dimly lit spot for a few days to encourage attachment. Surplus frags are often shared within the hobby.

4. 4Feed with Liquid Food

   Disc corals meet most of their nutritional needs through photosynthesis via zooxanthellae, but adding liquid food such as phytoplankton or amino acid supplements once or twice a week improves their condition. Pause pumps briefly during feeding and apply the food close to the polyps.

5. 5Avoid Sudden Water Changes

   Sudden shifts in salinity (target 1.023–1.025), temperature (24–26°C), or pH can cause polyps to shrink or bleach. Keep water changes to around 10–15% of total volume weekly, and always match the temperature and salinity of new water before adding it.

6. 6Watch Neighbor Corals

   Disc corals can release allelopathic chemicals that harm neighboring corals on contact. Maintain at least 5 cm of clearance from other soft corals or LPS. Always check for contact when rearranging the aquascape.

7. 7Cost Overview

   Prices vary by color and pattern; common green morphs typically cost around ¥500–¥2,000, while rare colorways can exceed ¥5,000. Initial equipment costs (lighting, filtration, refractometer, etc.) generally range from ¥20,000–¥50,000, with monthly running costs of a few thousand yen for electricity and consumables.

Frequently asked questions about Mushroom Coral

Q.Is Disc Coral suitable for beginners?

A.Yes, Disc Coral is considered one of the easiest corals to keep. It does not require intense lighting or complex dosing regimens. The main prerequisite is a stable, cycled saltwater aquarium—get that right and long-term success is very achievable.

Q.Why is my Disc Coral not opening?

A.Common causes include excessive flow, too much light, sudden water parameter shifts, or contact with a neighboring coral. First check flow direction and light intensity, then test salinity, pH, and ammonia. Once conditions stabilize, the polyp typically reopens within a few days to a week.

Q.How often should I feed Disc Coral?

A.Once or twice a week with a small amount of fine particulate liquid food is sufficient. Many specimens thrive without any supplemental feeding, relying on photosynthesis alone. Overfeeding is a greater risk than underfeeding, as excess nutrients degrade water quality.

Q.How do I propagate Disc Coral?

A.Simply cut the disc with clean scissors or a razor blade and place the fragment on live rock or a frag plug. Keep it in low flow and subdued light for one to two weeks while it attaches. The success rate is high, and attached frags grow quickly under normal conditions.

Q.How long does Disc Coral live?

A.Disc Coral is known to live over 10 years in well-maintained aquariums. Because it propagates through clonal splitting, a colony can be sustained indefinitely in practice. The primary factors shortening its lifespan are poor water quality and chronic stress from inappropriate flow or lighting.

Useful tools for Mushroom Coral care

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