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Mermaid's Fan
Udotea flabellum
Family: Halimedaceae
📍 Caribbean and tropical Western Atlantic
Elegant fan-shaped calcified macroalgae on a slender white stalk. Grows in sandy areas near reefs and seagrass beds. A beautiful decorative species for low-flow areas of the display tank. Like Penicillus, it anchors in deep sand and has a natural lifespan of several months.
Keeping this species
- flow
- low to gentle
- note
- calcified; provides calcium on die-off
- role
- beneficial — display
- placement
- deep sandbed
- lightLevel
- medium
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Natural Habitat Temperature
77°F — 84°F seasonal range · (Jan low, Jun high)