Their feces are a significant source of fertilizer to Spartina . Eastern oyster A filter-feeding bivavle with an irregular, asymmetrical, grayish shell up to 15 cm long. Attaches to rocks, pilings, and other oysters in brackish often polluted waters. Has supported a large commercial fishery for over 100 years. Argopecten irradians Bay scallop Bivalve with ribs radiating from hinge toward opposite edge of shell, up to 8 cm long.
Adductor muscle is sought after as food.
Attaches to Zostera marina during the early part of its life cycle. Fiddler crab Small, semi-terrestrial crab, up to 3 cm in width, which digs burrows in the mud under Spartina . Male has an enlarged claw, which he slowly waves in the air to attract females. Feeds on detritus and aerates the marsh sediments with their burrows. Female is larger than male.