Short Answer
- Torch, hammer, and frogspawn are best separated by tentacle shape and tip pattern.
- Torch usually shows long tentacles with single rounded tips.
- Hammer usually shows anchor, T, crescent, or hammer-shaped tips.
- Frogspawn usually shows multiple rounded tips or branched grape-like ends.
Start with tentacle shape, not color
Euphyllia-type corals are often sold by dramatic color names, but color is not the best first ID signal. Lighting, camera processing, and fluorescence can make two different corals look closer than they are.
A better first pass is to compare the tentacle ends. The end shape usually separates torch, hammer, and frogspawn faster than the body color does.
Common Euphyllia-type ID signals
| Hobby group | Most useful visual signal | Common confusion |
|---|---|---|
| Torch coral | Long tentacles with single rounded terminal tips. | Closed torch can look shorter and chunkier. |
| Hammer coral | Hammer, anchor, T, or crescent-shaped tentacle ends. | Strong flow can stretch tips and hide the hammer outline. |
| Frogspawn coral | Multiple rounded or grape-like tips on branched ends. | Partial extension can make branching hard to see. |
| Octospawn-type labels | Thicker clustered tips that may sit between common hobby labels. | Store naming may vary by region or vendor. |
Photo method for Euphyllia identification
- Take a short video if flow keeps changing the tentacle outline.
- Use reduced-blue lighting to reveal the actual tip shape.
- Capture the coral when it is fully open and not recently disturbed.
- Include a side angle to show whether the colony is branching or wall-like.
Use specific comparisons after the first pass
Once you know the likely group, move into a narrower comparison. That prevents generic Euphyllia labels from becoming overconfident species or trade-name claims.
If the visible traits conflict, keep the ID broad. Euphyllia-type LPS with a confidence note is often more useful than a forced retail label.
Try Coral Identifier on your own tank photos
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Sources
References and further reading
FAQ
Frequently asked questions
01What corals are usually called Euphyllia in the hobby?+
Reef hobbyists commonly group torch, hammer, frogspawn, and related flowing LPS corals under Euphyllia-style language, even though taxonomy and names can vary.
02What is the fastest way to identify a Euphyllia-type coral?+
Compare the tentacle tips. Torch usually has single rounded terminal tips, hammer has hammer or anchor-shaped tips, and frogspawn has multiple rounded or branched tips.
03Can I identify Euphyllia by color?+
No. Color is useful only after shape narrows the group. Blue light, fluorescence, and camera settings can make color misleading.
04What if my coral looks between two groups?+
Use a broad Euphyllia-type label and collect better photos or video. Do not force a precise label when the visible traits are mixed.