Coral Care Info Symphyllia

Symphyllia corals, often referred to as Closed Brain corals, are large polyp stony corals known for their thick, fleshy tissue and intricate valley-like patterns. They display bold coloration and can expand significantly under proper conditions, making them a strong visual centerpiece in reef aquariums. Symphyllia are relatively hardy for an LPS coral but require stable parameters, moderate lighting, and careful placement to thrive long term.

Care Requirements

Lighting (PAR Range)

• Symphyllia corals typically do best in 50-120 PAR.
• Moderate to lower lighting helps maintain vibrant coloration.
• Too much light can cause bleaching or tissue stress.
• Always acclimate new specimens slowly, especially those from new arrival corals.

Flow

• Low to moderate, indirect flow is ideal.
• Flow should gently move water across the coral without direct force.
• Strong flow can damage fleshy tissue and reduce expansion.
• Gentle flow supports healthy inflation and feeding response.

Placement

• Best placed on the sand bed or lower rockwork.
• Avoid sharp surfaces that can damage the underside.
• Allow space for expansion and feeding tentacles.
• Placement should be planned carefully in tanks with small polyp stonies corals, which may be affected by stings.

Aggression

• Moderately aggressive coral.
• Can extend sweeper or feeder tentacles, especially at night.
• May sting nearby corals if placed too close.
• Requires spacing in mixed reef environments.

Growth Rate

• Slow to moderate growth rate.
• Expands in size and thickens over time.
• Growth depends on stable parameters and feeding.
• Healthy specimens can become large, impressive colonies.

Feeding

Symphyllia corals benefit from supplemental feeding and often show improved expansion and coloration when fed regularly. While they are photosynthetic, they actively capture food. Newly introduced specimens from newest corals should be allowed to settle before starting a feeding routine.

• Feed meaty foods such as mysis shrimp, brine shrimp, or chopped seafood.
• Target feeding once or twice per week is typically sufficient.
• Ensure food is fully captured to maintain water quality.

Tank Compatibility

Symphyllia are well suited for mixed reef aquariums when given proper spacing and placement. Their fleshy tissue makes them vulnerable to aggressive neighbors. In tanks that include soft corals or spreading species like zoanthids, careful placement helps prevent contact and irritation.

• Keep on sand or stable lower rock away from aggressive corals.
• Avoid placing near species that may sting or overgrow them.
• Ensure stable placement to prevent shifting or damage.

Common Problems

• Tissue recession caused by unstable parameters or excessive light.
• Damage from strong flow or nearby aggressive corals.
• Failure to expand due to stress or poor placement.
• Bleaching caused by sudden lighting changes.

Tips for Success

• Provide moderate lighting and gentle flow.
• Feed regularly to support growth and coloration.
• Maintain stable alkalinity, calcium, and magnesium levels.
• Place on sand or smooth surfaces to protect tissue.
• Allow enough space to prevent aggression-related damage.

Frequently Asked Questions

Is Symphyllia the same as Trachyphyllia?
No, while they are similar in appearance, Symphyllia have more defined ridges and structure compared to the softer, more open appearance of Trachyphyllia.

Does Symphyllia need to be fed?
While it can survive on light alone, feeding improves growth, expansion, and overall health.

Can Symphyllia be placed on sand?
Yes, they are commonly placed on sand or lower rockwork where they can expand safely.

Is Symphyllia aggressive?
They are moderately aggressive and can extend feeding tentacles, so proper spacing is recommended.

Symphyllia corals are a bold and colorful addition to reef aquariums, offering thick tissue, strong structure, and impressive expansion. With proper care and placement, they can thrive and become a centerpiece coral in the tank. You can explore similar species in our large polyp stonies corals collection, browse larger specimens in our new arrival coral colonies, discover standout pieces in our featured corals, learn about our systems on our facility page, and stay updated through the Extreme Corals news and updates blog.