Mermaid's Fan

Care Summary

Mermaid's Fan (Udotea species) is a delicate calcified macroalgae forming fan-shaped fronds on a slender stipe. It needs to be anchored in a sandbed or rubble zone. Provide moderate lighting and gentle flow — strong flow can dislodge or damage the fan. Requires stable calcium and alkalinity like other calcifying macroalgae. A stunning display species that grows slowly and remains non-invasive. Typically lives 6–18 months; replace when fronds begin to pale.