How much light and flow does Frogspawn coral need?

Stony coral · LPS, medium light at roughly 100–150 µmol·m⁻²·s⁻¹ PAR, with medium flow. Light and flow must match: high light with weak flow burns tips, strong flow with weak light thins the tissue.

Will Frogspawn coral attack neighbouring corals?

It has sweeper tentacles: at night it extends tentacles several times its own width and burns whatever they reach. Leave at least one adult diameter between it and its neighbours.

Does Frogspawn coral need feeding?

Optional. It survives without feeding, but regular small doses improve growth and colour.

What water parameters does Frogspawn coral need?

24–26 °C, specific gravity 1.024–1.026, 7–9 dKH, 400–450 mg/L calcium, 1250–1350 mg/L magnesium. That is only 2 dKH wide, so stability matters more than hitting a particular number.

Is Frogspawn coral a good beginner coral?

Difficulty: moderate. Growth: medium. Place it in the midground / specimen. Spacing: tentacles can span 20 cm, so leave an open zone around it; placement matters more to its survival than feeding.

G-03 / 07Marine

Frogspawn coral蛙卵珊瑚

Fimbriaphyllia divisa · Euphylliidae

Frogspawn coral: each tentacle ends in a cluster of small bulbs, and of the three Euphyllia-type LPS it is the fussiest about flow.

Illustration to come

G-03 / 07 · Frogspawn coral Fimbriaphyllia divisa

SpecificationsCoral atlas

Name: 蛙卵珊瑚
Scientific name: Fimbriaphyllia divisa
Family: Euphylliidae
Origin: Reefs of the Indo-Pacific, including Indonesia, the Philippines and the Great Barrier Reef
Type: Stony coral · LPS
Light: Medium light
PAR: 100–150
Flow: Medium flow
Aggression: Sweeper tentacles
Feeding: Optional feeding
Alkalinity: 7–9 dKH
Calcium: 400–450 mg/L
Magnesium: 1250–1350 mg/L
Salinity: 1.024–1.026 SG
Growth: Medium
Placement: Midground / Specimen
Level: Moderate

Water requirementsMarine

Temp.24–26 °C

pH8.1–8.4

Salinity1.024–1.026 SG

Alkalinity7–9 dKH

Units: temperature in °C, hardness in German degrees (dGH / dKH), marine salinity as specific gravity at 25 °C, volume in litres. These are the values recorded for the species and do not follow the site unit switcher.

Keeping notes

1Spacing: tentacles can span 20 cm, so leave an open zone around it; placement matters more to its survival than feeding.
2Flow: low to medium; long tentacles snap in strong flow, which is the usual cause of a lost head.
3Feeding: optional — use tweezers to place food on the mouth instead of broadcasting it into the tank.
4Water tolerance: sensitive to alkalinity swings; brown jelly disease usually follows an injury or a sudden water change.
5Growth form: the cup splits in two, and the tentacles stretch with the current, so the space it claims drifts toward the flow over time.

Frequently asked questions

How much light and flow does Frogspawn coral need?: Stony coral · LPS, medium light at roughly 100–150 µmol·m⁻²·s⁻¹ PAR, with medium flow. Light and flow must match: high light with weak flow burns tips, strong flow with weak light thins the tissue.
Will Frogspawn coral attack neighbouring corals?: It has sweeper tentacles: at night it extends tentacles several times its own width and burns whatever they reach. Leave at least one adult diameter between it and its neighbours.
Does Frogspawn coral need feeding?: Optional. It survives without feeding, but regular small doses improve growth and colour.
What water parameters does Frogspawn coral need?: 24–26 °C, specific gravity 1.024–1.026, 7–9 dKH, 400–450 mg/L calcium, 1250–1350 mg/L magnesium. That is only 2 dKH wide, so stability matters more than hitting a particular number.
Is Frogspawn coral a good beginner coral?: Difficulty: moderate. Growth: medium. Place it in the midground / specimen. Spacing: tentacles can span 20 cm, so leave an open zone around it; placement matters more to its survival than feeding.