How deep underwater can eelgrass grow?
The depth limit for eelgrass is determined by the amount of light that can penetrate through water. Our native eelgrass can occur as deep as 120 feet in very clear water such as the fjords of Puget Sound. Dr. Rumrill has seen it at 90 feet. Normally in Coos Bay where the water is turbid and light does not penetrate very deep, eelgrass only occurs to a depth of about ten feet.
