Green Birdsnest Coral

Introduction to Birdsnest

Birdsnest corals (Seriatopora spp.) are a popular type of Small Polyp Stony (SPS) coral, prized for their intricate branching growth patterns and vibrant coloration. These corals come in a variety of hues, including pinks, greens, yellows, and purples, with some varieties displaying fluorescent tones under actinic lighting.

Known for their fast growth and unique structure, Birdsnest corals are an excellent choice for reef hobbyists looking to add texture and color to their aquarium. While they are considered moderately challenging, they are often recommended for hobbyists looking to expand their experience with SPS corals due to their adaptability in stable, well-maintained systems.

Natural Habitat and Origin

Birdsnest corals are native to the tropical waters of the Indo-Pacific, including regions like the Red Sea, Australia, and the Great Barrier Reef. They are commonly found in shallow reef zones where light intensity is high, and water flow is moderate to strong.

In their natural habitat, Birdsnest corals form dense, intricate colonies that provide shelter for small marine life. Their branching growth pattern is an adaptation to high-energy environments, allowing them to maximize nutrient uptake and maintain health in areas of consistent water movement.

Water Chemistry

Birdsnest corals require stable and well-maintained water conditions to thrive. As an SPS coral, they are sensitive to fluctuations, making consistent monitoring and maintenance essential.

Ideal Parameters:

• Calcium: 400–450 ppm
• Alkalinity: 8–10 dKH
• Magnesium: 1250–1350 ppm
• Nitrates: 1–10 ppm
• Phosphates: <0.03 ppm
• Temperature: 76–80°F
• Salinity: 1.024–1.026

Birdsnest corals benefit from nutrient-poor (but not sterile) water, with balanced nitrates and phosphates supporting their vibrant coloration. Regular water changes and testing are crucial for maintaining these parameters and ensuring long-term health.

Lighting

Birdsnest corals thrive under moderate to high lighting conditions, with a PAR range of 200–350 being ideal. Proper lighting promotes vibrant coloration and healthy, consistent growth. Blue-spectrum lighting, in particular, can enhance their fluorescent tones and bring out the finer details of their branching structure.

At Top Shelf Aquatics, we use advanced lighting systems such as Ecotech Marine Radions, T5 setups, and metal halides to provide optimal lighting conditions for Birdsnest corals. These systems replicate the intense lighting conditions found in their natural reef habitats.

When introducing Birdsnest corals to your tank, gradual acclimation to light is essential to prevent bleaching or stress. Start by placing them in a lower-light area and gradually increase their exposure over 2–3 weeks.

Water Flow

Birdsnest corals require moderate to strong, randomized water flow to thrive. Consistent flow is essential for delivering nutrients, removing detritus, and maintaining the overall health of their intricate branches. Proper water movement also prevents algae buildup, which can occur in their dense growth structure.

At Top Shelf Aquatics, we use advanced flow systems such as Ecotech Marine MP pumps, Reef Octopus Octo Pulse systems, and Sicce pumps to replicate the natural conditions Birdsnest corals experience in the wild. This ensures their polyps can extend fully and support optimal growth.

When placing these corals in your tank, avoid direct, high-pressure currents that can cause tissue damage. Position them in areas with steady, indirect flow to promote their natural appearance and health.

What We Feed

Birdsnest corals primarily rely on their symbiotic zooxanthellae for energy, converting light into nutrients through photosynthesis. While they do not require supplemental feeding, occasional additions of small-particle foods can enhance their growth and coloration, especially in nutrient-limited systems.

Recommended Foods:

• Tisochrysis
• Rhodomonas
• Tetraselmis
• Products like Reef Roids and Benepets Coral Food

Feeding is best done by broadcasting small amounts of food into the water column near the coral. This allows them to capture suspended particles naturally. Pausing water flow for 10–15 minutes can improve nutrient uptake and ensure effective feeding.

Coloration and Tank Maturity

Birdsnest corals are admired for their vibrant colors, which include pink, green, yellow, and purple varieties. These tones are further enhanced under blue-spectrum lighting, which highlights their fluorescent qualities and showcases their intricate branching structure. Maintaining stable water parameters, proper lighting, and consistent water flow is essential for preserving their vibrant hues.

One of the unique aspects of Birdsnest corals is their adaptability. They can do well in both newer and mature reef systems, provided water conditions remain stable and nutrient levels are appropriately balanced. This adaptability makes them a versatile choice for hobbyists of varying experience levels.

Common Challenges

Birdsnest corals are relatively hardy for an SPS coral, but they can still encounter challenges if conditions are not ideal:

• Bleaching: Sudden changes in lighting or exposure to excessive intensity can cause bleaching. Gradual acclimation to light is essential to avoid stress.
• Tissue Loss (STN/RTN): Slow Tissue Necrosis (STN) or Rapid Tissue Necrosis (RTN) can occur due to unstable water parameters or stress. Maintaining consistent alkalinity, calcium, and nutrient levels helps prevent these issues.
• Polyp Bailout: Under extreme stress, such as unstable water conditions or significant parameter fluctuations, Birdsnest corals may release their polyps in a process known as polyp bailout. Interestingly, these polyps can settle and potentially grow into new colonies if conditions improve.
• Algae Growth: The dense branching structure can trap detritus or foster algae growth if water flow is insufficient. Strong, indirect flow helps prevent these problems.
• Polyp Retraction: Poor water quality or inadequate lighting can cause prolonged polyp retraction, impacting health and growth. Regular testing and adjustments ensure optimal conditions.

Acclimation Guide

Proper acclimation is crucial for ensuring Birdsnest corals adjust smoothly to their new environment. Follow these steps to minimize stress and promote healthy growth:

1. Temperature Acclimation: Float the sealed bag in your aquarium for 15–20 minutes to equalize the temperature and prevent sudden thermal shocks.
2. Drip Acclimation: Gradually mix tank water with the shipping water over 30–45 minutes using a drip line or small cup. This allows the coral to adjust to differences in salinity and water chemistry.
3. Lighting Acclimation: Place Birdsnest corals in a lower-light area of the tank initially. Gradually increase their exposure to moderate or high lighting over 2–3 weeks to prevent bleaching or stress.
4. Placement: Secure the coral to rockwork or a frag plug in an area with moderate to strong water flow. This ensures debris is swept away, and the coral receives proper nutrient delivery.