How much space does a Hammer Coral need?

At least 15 cm from other corals, and more as the colony grows.

Is it the same as Euphyllia ancora?

Yes. The accepted name is now Fimbriaphyllia ancora; the older name is still widely used in the trade.

MarineCoralsIntermediate

Hammer Coral

Fimbriaphyllia ancora

A large-polyp stony coral with hammer-shaped tentacle tips, popular for its constant gentle movement and manageable care needs.

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Ideal Conditions

Temperature: 24 – 27 °C
pH range: 8.1 – 8.4
Salinity: 1.024 – 1.026 SG
Adult size: 15 – 40 cm
Min. tank size: 100 litres+
Diet: Photosynthetic, supplemented with small meaty foods
Water flow: Low to moderate, indirect
Preferred setup: Stable reef with steady alkalinity and calcium

About the Hammer Coral

Hammer Coral is one of the standard LPS corals in a mixed reef. It is forgiving of moderate lighting and flow, grows into impressive colonies and is straightforward to frag, but it defends its space with long stinging sweeper tentacles.

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Is it right for your tank?

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Where Hammer Coral comes from

Native range

Indo-Pacific, Coral Triangle

Countries / regions

Indonesia, Australia, Philippines

Habitat

Sheltered reef slopes and lagoons with moderate light and gentle current.

Illustrative native range only, not an occurrence dataset.

Similar species

Torch Coral
Euphyllia glabrescens
Frogspawn Coral
Fimbriaphyllia divisa

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

View all compatibility

Torch Coral
Euphyllia glabrescens
Closely related and generally tolerant of each other, but both sweep, so leave clear space between colonies.
Compatible with caution
Ocellaris Clownfish
Amphiprion ocellaris
Clownfish sometimes host in hammer corals, which can irritate the coral over time.
Compatible with caution
Flame Angelfish
Centropyge loricula
Some dwarf angels nip LPS corals; watch a new angel closely.
Compatible with caution
Bubble Tip Anemone
Entacmaea quadricolor
A mobile anemone will sting the coral as it wanders.
Not recommended

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