Udotea Flabellum Macro Algae Expand

Udotea Flabellum


Commonly called the Mermaid's Fan plant is a real eye catcher for the planted marine aquarium. It is a green calcareous algae which features at the end of its stems a dark green fan shaped top. It will hold itself with rhizoids in the substrate, which should be deep a few inch deep therefore.

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Udotea Flabellum Marine Macro Algae

As this alga is a very calcified macroalga it is often not eaten by fishes and critters and it needs good calcium levels in the water.

Although it can grow on rock ( by supergluing it for the start ) it will spread wider and better when it is placed in a sand bed or gravel, which should be preferable min. between 5-10cm deep.

Whitish parts of it should be removed as they are decomposing. Out of water and in transit it might turn white, but back in the water, it will turn after a few hours back green again.

These macroalgae prefer not too high levels of Nitrate and Phosphate and will grow better with the additional supplement of Iron, Magnesium and Trace elements. As it is a calcified macroalga a sufficient Calcium level should be maintained.

Scientific NameUdotea Flabellum
Common NameMermaid's Fan
Growth Rate:Moderate
Maximum Height12"
Food Value:Not Palatable
Nutrient Uptake:Good
Flow Rate:Medium
PropagationFragmentation, Sporulation
ColourGreen Macroalgae
Depth found1-15 m
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