Common eelgrass (Zostera marina)
Care, watering, light and tips for Common eelgrass on Floravia.
Quick facts
- Family: Zosteraceae
- Difficulty: Moderate care
- Watering: every 7 days
- Light: Partial shade
- Temperature: 10–30 °C
About Common eelgrass
Zostera marina, commonly known as seagrass or 'eelgrass', is a submerged aquatic plant that forms extensive underwater meadows in temperate coastal waters. Its long, narrow, bright green leaves sway with the currents, creating a vital habitat for numerous marine species. It is ideal for large marine aquariums and coastal ecosystem restoration projects.
Native range
Temperate and cold coasts of the northern and southern hemispheres
Care tips
It requires intense and consistent light, preferably direct sunlight or high-power aquarium lighting, for at least 10-12 hours a day. It needs saltwater with stable salinity (28-35 ppt) and a sandy or muddy substrate rich in nutrients for proper rooting. Avoid abrupt changes in temperature and salinity, as these can severely stress the plant and lead to its decline.
How to save a dying Common eelgrass
- Warning signs
- Pale or yellowing leaves, excessive epiphytic algae, slow or no growth, rot at the base.
- First aid
- Assess water quality (salinity, nutrients, temperature). Gently remove algae. Ensure good water circulation.
- What kills it
- Drastic salinity changes, water pollution, insufficient light (even in turbid waters, it needs light), unstable anchorage.
- Can it be saved?
- Yes, if adverse environmental conditions are corrected promptly. Recovery can be slow.