Euphyllia ancora (Orange-Yellow) (Premium)

• Indo-Pacific
• Moderate Care Level
• For Intermediate Hobbyists
• Moderate to High Placement in Reef Tank

Euphyllia ancora, commonly referred to as the Anchor Coral, is a species of LPS (Large Polyp Stony) coral native to the Indo-Pacific region, particularly found in areas like the Philippines, Indonesia, and the Great Barrier Reef. This species is famous for its long, flowing tentacles that can form large, impressive colonies. The most striking feature of Euphyllia ancora is its vibrantly colored stem, which can range from bright greens, blues, purples, pinks, and even yellows. The polyps, on the other hand, are typically green, brown, or purple, and their tips are often brightly colored, which contrasts beautifully against the base.

The colored stems of Euphyllia ancora can make it a unique and vibrant addition to any reef tank. These corals are somewhat slow-growing but can eventually develop a large colony over time, with polyps that can extend several inches from the base, creating an elegant, flowing appearance that adds movement and color to the tank.

Placement in the Tank

Euphyllia ancora prefers moderate to high lighting, with optimal lighting intensity ranging from 150-250 PAR. While it can tolerate lower lighting, its colors will become more vibrant under higher light conditions. For best results, place it in the middle or upper sections of the reef tank where it can receive moderate to intense light without being exposed to direct lighting for long periods, which may cause stress.

In terms of water flow, Euphyllia ancora thrives in moderate to gentle water movement. Too strong a current can cause its polyps to retract or be damaged, while a low flow can lead to poor feeding and waste removal. A gentle to moderate flow is ideal, ensuring that the coral can feed efficiently while maintaining healthy tissue extension.

Water Parameters

To ensure the long-term health and growth of Euphyllia ancora, the following water parameters should be maintained:

• Temperature: 24°C to 28°C (75°F to 82°F), with 26°C (79°F) being optimal.
• Salinity: 1.023–1.025 specific gravity (SG), with 1.024 being ideal for maintaining proper osmotic balance.
• pH: 8.0 to 8.4, with 8.2 being optimal for maintaining stable metabolic functions in corals.
• Alkalinity (dKH): 8-12 dKH, with 9-10 dKH being optimal to support healthy skeletal formation and avoid pH fluctuations.
• Calcium: 400-450 ppm for proper skeleton development. Ensure stable calcium levels to support growth.
• Magnesium: 1250-1350 ppm. Magnesium helps balance calcium and alkalinity in the aquarium.
• Nitrate: Less than 5 ppm. Nitrate accumulation can cause unwanted algae growth, which can compete with the coral for nutrients.
• Phosphate: Below 0.03 ppm. Elevated phosphate levels can inhibit coral growth and promote algae blooms.

Feeding

Euphyllia ancora is a photosynthetic coral that relies on zooxanthellae algae for the majority of its nutritional needs through photosynthesis. However, it is also a filter feeder and benefits from occasional supplemental feeding, especially in tanks with limited planktonic organisms.

To feed it, offer meaty foods like mysis shrimp, brine shrimp, or zooplankton, or use liquid coral foods. Feed it 1-2 times a week, as this will provide the additional nutrients it needs without overloading the tank with excess food.

Feeding should be done using a targeted feeding method to ensure the coral’s polyps extend fully, allowing them to capture the food effectively. Overfeeding can lead to water quality issues, so it’s important to provide only the necessary amount of food.

Maintenance and Care

To maintain the health and beauty of Euphyllia ancora, regular maintenance is essential:

• Water Changes: Perform regular water changes of about 10-15% weekly to keep water quality high and maintain the balance of essential elements in the tank.
• Water Parameter Monitoring: Consistently monitor temperature, pH, calcium, nitrate, phosphate, and alkalinity. Small fluctuations in these parameters can cause stress to the coral and result in poor polyp extension or retraction.
• Space for Growth: Ensure that Euphyllia ancora has enough space to grow and develop its colony. As it can grow large over time, provide it with ample space away from aggressive corals that might sting or overshadow it.
• Pest Control: Regularly check for pests like Aiptasia, flatworms, or nudibranchs, which can harm the coral. Take prompt action if pests are found to prevent damage.

Compatibility

Euphyllia ancora is a generally peaceful coral species and will do well in tanks with other non-aggressive corals such as other LPS or soft corals. However, it should be placed away from aggressive species, such as certain SPS corals, large LPS corals with long tentacles, or anemones, which can sting and harm the Anchor Coral. It can be placed with other peaceful species like Blastomussa, Favia, and Acanthastrea, provided there’s sufficient space between colonies.

Conclusion

Euphyllia ancora (colored stem) is a beautiful, striking LPS coral that can bring vibrant color and movement to your reef tank. With its long, flowing polyps and vibrant stem colors, it is a favorite among hobbyists looking for a unique and colorful coral. By providing the right light intensity, moderate to gentle water flow, and maintaining optimal water parameters, Euphyllia ancora will thrive and add a stunning visual element to any reef tank. It is suitable for intermediate hobbyists who are comfortable with moderate care levels, and with regular maintenance and proper placement, this species can grow into a beautiful, eye-catching centerpiece in your aquarium.