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Datasheet
| Care Description | Hammer corals are an iconic large polyp stony coral (LPS) that has been a staple in the hobby for generations. They are found all throughout the Pacific reefs and come in a variety of colors and growth forms. Hammer corals sometimes grow in a wall formation while other hammers grow in a branching formation. Either variety makes an excellent show piece coral for a reef aquarium however the branching varieties tend to grow more quickly. Please see below for additional care tips for hammer corals. |
| Water Flow | Moderate to Strong |
| Temperature | 22.2°C / 71.96°F - 25.6°C / 78.08°F |
| Specific Gravity | 1.023-1.026 |
| Carbonate Hardness | 8-12 |
| pH | 8.1-8.4 |
General Description
Hammer corals, belonging to the Euphyllia genus, are large polyp stony corals (LPS) that are widely recognized in the hobby due to their iconic status. They can be found across Pacific reefs, showcasing a variety of colors and growth forms, with some growing in wall formations while others in branching structures.
Demands and Hardiness
Hailing as a staple in the hobby, Hammer corals make for excellent showpiece corals in reef aquariums, with branching varieties exhibiting faster growth rates. While they rely significantly on their zooxanthellae for nutrition, direct feeding with small critters like Mysis Shrimp and pellets between 6 to 13mm can be beneficial since Hammers, torches, and frogspawn do not tend to aggressively feed like some other LPS corals.
Lighting
These corals can thrive under low lighting conditions, making them suitable for normal output fluorescents. Although they may extend more readily under subdued lighting, placing them under stronger lighting can enhance their coloration, particularly in varieties like the Supernova Hammer.
Water Flow
Moderate to strong water movement is recommended for Hammer corals, as they elegantly sway in the current. Adequate water flow not only promotes the health of the coral but also adds to the aesthetic appeal of the aquarium.
Feeding
While relying on zooxanthellae products, Hammer corals can also benefit from direct feeding. Finding the right food, such as Mysis Shrimp and similar small critters, can be advantageous for their growth and overall health.
Propagation
Hammer corals have been extensively propagated in captivity and are considered excellent candidates for aquaculture. However, their slow growth compared to other stony corals, especially in wall varieties, poses a challenge for large-scale commercial aquaculture. Branching varieties are more promising for successful propagation efforts.
Localization & Habitat
Hammer corals are widespread in the tropical waters of the Pacific, frequently harvested from regions like Fiji, Tonga, Solomon Islands, and the Great Barrier Reef. Captive propagation efforts aim to achieve sustainable harvests over time to support the coral's conservation.