Introduction to Plate Corals

Fungia corals, commonly referred to as Plate Corals or Disc Corals, are a distinctive type of Large Polyp Stony (LPS) coral, known for their solitary, disc-like structure and vibrant coloration. These corals come in a stunning range of hues, including oranges, greens, purples, and reds, often enhanced with fluorescent patterns that glow under blue-spectrum lighting.

What makes Fungia truly unique is their remarkable ability to recover even after bleaching or dying. In some cases, they can regenerate by sprouting small baby corals, known as anthocauli, on their old skeleton, which will eventually grow into a full colony of plate corals.

Natural Habitat and Origin

Fungia corals are native to the tropical waters of the Indo-Pacific, including regions such as Indonesia, Australia, and the Great Barrier Reef. They are commonly found on sandy lagoon floors or rubble zones, where their free-living, disc-like structure allows them to rest and move with the current.

In the wild, Fungia corals thrive in areas with moderate light and gentle water flow, often settling in nutrient-rich environments. Their ability to regenerate and adapt to changing conditions makes them well-suited for dynamic reef zones, where their vibrant colors and unique growth patterns add to the reef’s biodiversity.

Water Chemistry

Fungia corals require stable water conditions to thrive and maintain their vibrant colors. As with other LPS corals, consistent parameters are essential to prevent stress and promote healthy growth.

Calcium: 400–450 ppm
Alkalinity: 8–12 dKH
Magnesium: 1250–1350 ppm
Nitrates: 5–15 ppm
Phosphates: <0.10 ppm
Temperature: 76–80°F
Salinity: 1.024–1.026

Regular water changes and careful parameter monitoring will help maintain the conditions Fungia corals need to flourish. They are moderately tolerant of slightly elevated nutrients but are sensitive to rapid changes in water quality.

Lighting

Fungia corals thrive under low to moderate lighting conditions, with a PAR range of 50–150 being ideal. Their flat, plate-like structure allows them to efficiently capture light, even in shaded areas of the tank. Excessive light can cause bleaching or stress, so it’s important to avoid high-intensity lighting.

At Top Shelf Aquatics, we use advanced lighting systems such as Ecotech Marine Radions and T5 setups to replicate the soft, natural lighting Fungia corals experience in their wild habitats. Blue-spectrum lighting enhances their fluorescent colors, making them a stunning addition to reef tanks.

Water Flow

Fungia corals prefer gentle to moderate water flow, allowing their plate-like structure to remain stable while ensuring proper nutrient delivery and waste removal. Avoid placing them in areas with strong currents, as this can cause displacement or damage.

At Top Shelf Aquatics, we use advanced flow systems, such as Ecotech Marine MP pumps and Sicce pumps, to create consistent, indirect water movement. This setup mimics the natural conditions Fungia corals experience in their wild habitats.

What We Feed

Fungia corals rely on their symbiotic zooxanthellae for much of their energy, but supplemental feeding can significantly enhance their growth, coloration, and overall health. These corals are active feeders and can readily accept a variety of meaty and planktonic foods.

Mysis shrimp
Finely chopped seafood, such as scallops or squid
Products like Reef Roids and Benepets Coral Food
Tisochrysis or other plankton-based supplements

Feeding is best done by gently placing food on or near the coral’s central mouth. Perform feedings 1–2 times per week, ideally during the evening or when its feeding tentacles are extended. Pausing water flow for 10–15 minutes ensures the coral has enough time to capture and consume food effectively.

Coloration and Tank Maturity

Fungia corals are celebrated for their vibrant and dynamic coloration, which includes hues of orange, green, purple, red, and yellow, often with fluorescent accents under blue-spectrum lighting. Their bold colors make them a standout addition to any reef tank, and proper care ensures they retain their brilliance over time.

These corals are highly adaptable and can thrive in both new and mature systems, provided water parameters remain stable and lighting and flow conditions are appropriate. While Fungia can perform well in newer tanks, mature systems often provide the consistency and balance needed for optimal growth and enhanced coloration.

Common Challenges

While Fungia corals are relatively hardy, they can encounter specific challenges if their care requirements are not met:

Bleaching: Excessive lighting or sudden changes in light intensity can cause bleaching. Gradual acclimation to lighting conditions and placing them in low to moderate light areas help prevent this issue.
Tissue Recession: Poor water quality, unstable parameters, or physical damage can lead to tissue loss. Maintaining consistent alkalinity, calcium, and nutrient levels is essential for preventing this problem.
Detritus Accumulation: Their flat, plate-like structure can trap debris, leading to irritation or algae growth. Gentle, consistent water flow is key to keeping their surface clean.
Overturning or Movement: As free-living corals, Fungia can be displaced by strong currents or tank inhabitants. Ensuring they are placed on stable, flat surfaces helps avoid this issue.
Polyp Retraction: Poor water conditions or sudden environmental changes may cause prolonged polyp retraction, which can affect feeding and health.
Regeneration Challenges: While Fungia are known for their ability to regenerate and sprout baby corals on their skeletons, extreme stress or neglect may inhibit this remarkable recovery process.

Acclimation Guide

Proper acclimation is essential to ensure Fungia corals adjust smoothly to their new environment. Follow these steps to minimize stress and promote healthy growth:

Temperature Acclimation: Float the sealed bag in your aquarium for 15–20 minutes to equalize the temperature.
Drip Acclimation: Gradually mix tank water with the shipping water over 30–45 minutes using a drip line or small cup.
Lighting Acclimation: Begin by placing the coral in a shaded or low-light area of the tank. Gradually increase exposure to moderate lighting over 2–3 weeks to avoid stress or bleaching.
Placement: Position Fungia corals on a flat, sandy substrate or stable surface with gentle to moderate water flow.

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