Hammer Coral
Euphyllia ancora
What you need to keep a Hammer Coral
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pH
8.1–8.4
Temperature
24–27 °C
Where to buy
Compare prices from SA aquarium shops listing Hammer Coral.
Avg. price
R711
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Overview
What to know before you buy.
A popular Large Polyp Stony (LPS) coral, the Hammer Coral has distinctive hammer-shaped tentacles that create beautiful movement. They can be aggressive, using their long sweeper tentacles to sting nearby corals, so they require careful placement. They prefer moderate light and flow.
Key traits
Care guide
Keeping Hammer Coral healthy in a South African setup.
Placement & light
Place it low in the tank at first and move it up over a few weeks if it stays closed or browns. Match flow to the coral: most fleshy corals want gentle, indirect flow.
Water parameters
Keep pH 8.1–8.4 and 24–27°C, with salinity around 1.025–1.026. Alkalinity, calcium and magnesium matter more than any single reading: keep them stable and test weekly.
Feeding
Filter feeder. Target-feed small meaty foods such as mysis once or twice a week.
Stinging & spacing
Many corals and anemones sting what they touch, some with sweeper tentacles that reach well beyond the colony at night. Leave clear space around Hammer Coral as it grows.
Reef compatibility
Large angelfish and butterflyfish nip at corals and anemones; most reef fish, shrimp and snails leave it alone.
Propagation
Hammer Coral can be fragged: cut or break a piece with a clean tool, glue it to a plug, and keep it in moderate light and flow while it heals.
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