Hammer Coral Care Guide
Euphyllia ancora · Saltwater LPS Coral
What Hammer Coral look like
Euphyllia ancora, commonly known as Hammer Coral, exhibits a distinctive morphology characterized by its elongated, hammer-shaped polyps that can reach up to 12 inches (30 cm) in diameter in optimal conditions. The coral's skeleton is robust and forms a branching structure, with individual polyps extending from the main branch, each featuring a prominent, thickened oral disc surrounded by long, fleshy tentacles. These tentacles can exhibit a range of colors, including green, brown, and various shades of blue or purple, often with contrasting tips. Hammer Coral displays minimal sexual dimorphism, although larger specimens may exhibit slightly more pronounced polyp structures. Its defensive adaptations include the ability to retract its polyps into the skeleton during periods of stress or aggression, and it possesses nematocysts that can deliver a mild sting to deter potential predators. Unique to this species is its ability to form large colonies that can create a stunning visual display in reef aquaria.
Behavior & temperament
Euphyllia ancora is generally a peaceful coral that thrives in a variety of social environments, often found in mixed reef settings. It exhibits a moderate level of aggression towards neighboring corals, using its tentacles to extend and engage in sweeper tentacle behavior to defend its territory. The polyp extension is most pronounced during the evening and nighttime hours when feeding occurs, as this species is primarily nocturnal in its feeding habits. Hammer Coral engages in a symbiotic relationship with zooxanthellae, utilizing photosynthesis for energy while also capturing plankton and small particles from the water column. Its movement is limited, but it can expand and contract its polyps significantly, allowing for effective feeding and interaction with its environment.
Diet & feeding
Euphyllia ancora is a facultative photosynthetic coral that primarily feeds on zooplankton and phytoplankton in the wild. In captivity, it requires a diet supplemented with high-quality coral foods and occasional meaty offerings to ensure optimal health and growth.
Behind the name
The genus name 'Euphyllia' is derived from the Greek words 'eu' meaning 'good' and 'phyllon' meaning 'leaf', referring to the leaf-like appearance of its polyps. The species name 'ancora' is Latin for 'anchor', likely referencing the coral's robust base and attachment to substrates.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Hammer Coral?
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