Green Branching Hammer

Green Branching Hammer, Euphyllia ancora, are magnificent hard corals. They are armed with beautiful, anchor or hammer shaped sweeper tentacles, which gives the coral its name. They are an interesting and colourful coral to keep. Please note that the images displayed on our website are intended as a guide only. We have done our utmost to provide the closest representation possible for this type of coral, to help give an idea of what to expect. Corals are living organisms that can exhibit significant variation in colour and appearance due to a range of environmental and genetic factors. For example, the following are a few examples of conditions that can influence how corals look: Lighting: The brand, spectrum, intensity, and duration of light play a major role in how corals display their colours. Transit: Corals may change colour after being moved. They may either regain their original appearance or adapt to suit their new environment. Water Chemistry: Elements such as pH, salinity, and trace minerals can subtly or significantly alter a coral’s appearance. Nutrition: The availability and type of nutrients can affect both colouration and growth. With this in mind, please be aware that actual specimens may differ in appearance. Defining Characteristics Euphyllia, such as hammer corals, can display an array of captivating shades. Including green, yellow, gold, orange, brown, pink, and blue, often with contrasting tips. Hammer corals can be identified by their branching structure and the bulbous hammer shaped tips of their tentacles. Taxonomy Hammer corals belong to the genus Euphyllia within the family Euphylliidae. Their closest relatives include frogspawn and torch corals. Distribution Green Branching Hammers are commonly found in the tropical waters of the Indo-Pacific region, including areas around Fiji, Tonga, and the Great Barrier Reef. Natural Habitat Hammer corals inhabit shallow reef slopes and lagoons, typically found in areas with moderate water movement and light exposure. Symbiotic Relationship Like many corals, Green Branching Hammers maintain a vital symbiotic relationship with zooxanthellae, a type of photosynthetic algae that resides within their soft tissues. These microscopic algae live in a mutually beneficial partnership with the coral. Through the process of photosynthesis, zooxanthellae convert sunlight, carbon dioxide, and water into oxygen and organic compounds, such as glucose and amino acids. These compounds are then shared with the coral host, providing most of its daily energy needs. In return, the coral provides the algae with a protected environment and access to its metabolic waste products, such as carbon dioxide and nitrogen, which the algae use to fuel further photosynthesis. This tight-knit relationship supports the coral’s growth and is responsible for the vibrant colours seen in coral tissue. However, this relationship is delicate. If environmental conditions become stressful, such as during elevated sea temperatures, poor water quality, or prolonged lack of light, the coral may expel the zooxanthellae in a process known as coral bleaching. This leads to a loss of colour and energy source, potentially threatening the coral’s survival if exposure to stress is prolonged. Keeping Green Branching Hammer Healthy Hammer corals are generally considered moderate in terms of care difficulty. They are somewhat resilient but can be sensitive to sudden changes in water parameters. They should be introduced to established and stable tanks. They have aggressive tendencies, using sweeper tentacles to defend their space against other corals. They have a fair reach compared to some so will need adequate space. Light Level Green Branching Hammer do well under moderate light levels. In general, Euphyllia isn’t as demanding as some other corals can be so they can be placed in a greater range. Subdued lighting may impact their colour however where as too much light will put them under stress. To find the best light level, place them in an area where they receive indirect light and adjust based on their response. Corals will react differently under different light intensities and under different spectrums. Feel free to ask for advice. Flow Rate Moderate to strong water flow is ideal. Ensure a gently, alternating current to keep their tentacles swaying without causing damage. The flow should be strong enough to keep debris off the Green Branching Hammer polyps and out of the mass but gentle enough to allow them to expand fully and sway naturally and feed properly. Positioning them in areas of the tank where they receive indirect flow is ideal. These corals are very responsive and will retract when knocked or if in too fast a flow. It is much easier to see if they are in the wrong place in that regard. Feeding While Green Branching Hammer primarily relies on their symbiotic algae for nutrients, they do benefit from occasional direct feeding. Offer them small meaty foods like brine shrimp or specialized coral foods by gently squirting the food near their tentacles with a pipette. All our corals are fed on Coral foods such as, amino acids and plankton. Target feeding with a pipette or coral feeder helps ensure the food reaches the polyps directly. Reproduction. 1) Sexual Reproduction. Most corals, such as hammers, engage in sexual reproduction through a process known as spawning. During spawning events, corals release eggs and sperm into the water column simultaneously. This typically occurs in a synchronized manner, often triggered by environmental cues such as temperature changes, moon phases, and day length. The synchronization maximizes the likelihood of fertilization. 2) Asexual Reproduction. One common form of asexual reproduction in corals is budding, where new polyps bud off from parent polyps. This process can occur within the same colony, helping it grow and expand. 3) Importance of Reproduction in Coral Ecology. Coral reproduction is crucial for the maintenance and expansion of coral reefs. Sexual reproduction introduces genetic diversity, which enhances the resilience of coral populations to environmental stressors such as climate change, diseases, and bleaching events. Asexual reproduction allows for the rapid expansion of colonies and the repair of damaged areas within a reef. Summary Green Branching Hammer, Euphyllia ancora, are magnificent hard corals. they are armed with beautiful, anchor shaped sweeper tentacles, that host photosynthetic algae. They are a fleshy coral that can be damaged if light or water flow is too high. Hammers are aggressive so they need to be given plenty of space. They also need to be target fed meaty foods such as Krill and Mysis.