Torch, Hammer or Frogspawn? Compare the Clues

Similar movement and bright colors can make these corals look alike across a shop display. Start with visible structure, and keep the name provisional when the photograph is incomplete.

Tentacle tips are a clue

Torch corals commonly have long tentacles ending in single rounded tips. Hammer-type corals may show anchor- or hammer-like tips. Frogspawn-type tentacles can have clustered or branching tips. Retraction, viewing angle and individual variation can obscure those features.

Names have changed

Torch coral is commonly identified as Euphyllia glabrescens. Several hammer and frogspawn species are placed in Fimbriaphyllia in revised classifications. A retailer's older Euphyllia label may therefore differ from a current reference. Common names also cover more than one growth form.

Photograph without disturbing

• Take a full colony view and a sharp close view of the tips.
• Include an older image if the coral is currently retracted.
• Keep the original seller or culture records.

Identification is not compatibility

A similar name or appearance does not guarantee that neighboring colonies can touch safely. Plan space independently of the identification discussion. The accompanying tip drawings are schematic clues, not species reference photographs.

Join the discussion

Which torch, hammer or frogspawn coral is your favorite?

Sources and further reading

• Australian Government: coral biology and taxonomy assessment