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Eelgrass (Zostera marina)
Eelgrass is the most common species of seaweed growing in the Northern Hemisphere and it is also abundant in the Estonian coastal waters and the Gulf of Riga, but there is no eelgrass growing in Lithuanian coast.

Eelgrass meadows are home for 22 animal species.

Eelgrass differs from bladder wrack and red seaweed because the latter two are alga, which have a simpler inner structure, and the eelgrass is a plant with complex different inner tissues.
Eelgrass (Photo: Estonian Marine Institute of Tartu University)
Eelgrass (Photo: Estonian Marine Institute of Tartu University)