Eelgrass is a vital habitat for creatures such as seahorses and pipefish and a nursery for juvenile fish, but critically it is also a vast carbon sink.

Source: https://www.independent.ie/irish-news/kerry-fishermen-in-bid-to-preserve-sea-meadows-that-act-as-crucial-carbon-sink/a1834586878.html

Eelgrass serves as a vital habit for a broad range of marine life, including bay scallops, while river herring are a “foundation fish,” an important part of the bay’s ecosystem on which striped bass, bluefish and other sportfish feed.

Source: https://www.wanderer.com/happenings/buzzards-bay-water-quality-improved-since-2015/