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Dragon's Tongue
Halymenia sp.
Plantae›Rhodophyta›Florideophyceae›Halymeniales›Halymeniaceae
📍 Indo-Pacific and Caribbean shallow reefs
Brilliant scarlet-red, blade-shaped macroalgae — one of the most visually striking species for display refugia. Provides excellent colour contrast and nutrient export. More delicate than Chaeto; requires moderate flow and consistent light. Popular with collectors and stunning under reef lighting.
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Quick Facts
- flow
- gentle to moderate
- note
- sensitive to high nitrates — keep below 10 ppm
- role
- beneficial — display / refugium
- lightLevel
- medium
Water it likes
- ph
- 8.1–8.4
- hardness
- 8–12 dGH
- temperature
- 72–81°F (22–27°C)
Legality
No state or federal restrictions on record for this species.
Not legal advice, and possibly incomplete or out of date. Rules vary by state and locality and change over time — always confirm the current regulations with your state wildlife or agriculture agency before buying, keeping, or shipping this species.