How long can alge live without light?

Algae can survive without light for varying lengths of time depending on the species and environmental conditions. Some algae, particularly those that are heterotrophic, can live for several days to weeks by utilizing stored energy reserves. However, most photosynthetic algae rely on light for energy production and may only survive for a few days without it before their energy reserves are depleted. Ultimately, the duration depends on the specific type and environmental factors.