Eelgrass
Scientific Name: Zostera marina
Category: plant
Brief Description
A type of submerged aquatic vegetation that grows in marine and estuarine environments, forming dense underwater meadows.
Characteristics
Long, bright green, ribbon-like leaves that are typically 3-10 mm wide and can grow up to several feet long. The leaves have rounded tips and are often seen washed up on beaches in tangled mats known as wrack.
Habitat
Coastal waters, estuaries, and sheltered bays in sandy or muddy substrates, usually in the intertidal or subtidal zones.
When to Find It
Perennial, though growth peaks in spring and summer. Often found washed ashore after winter storms.
Conservation Status
Vulnerable in many regions due to water pollution, dredging, and climate change.
Ecological Role
Acts as a critical nursery ground for fish and shellfish, stabilizes sediments with its root systems, and sequesters significant amounts of carbon (blue carbon).
Easily Confused With
Surfgrass (Phyllospadix), which grows on rocky shorelines rather than sandy bottoms, and various species of seaweed/algae which lack the true root and vascular systems of eelgrass.
Observation Tips
Look for eelgrass meadows at low tide in shallow estuaries, or examine the 'wrack line' on beaches where dried leaves often accumulate.
Interesting Facts
Despite looking like seaweed, eelgrass is a true flowering plant that evolved from land plants to live back in the ocean millions of years ago.