Solemya velum, the Atlantic awning clam, is a species of marine bivalve mollusc in the family Solemyidae, the awning clams. This species is found along the eastern coast of North America, from Nova Scotia to Florida and inhabits subtidal sediments with high organic matter (OM) content and low Oxygen, such as salt ponds, salt marshes, and sewage outfalls.

Species within the Solemya genus are distinguished by their reduced or absent guts and their association with symbiotic, chemosynthetic bacteria, which produce metabolic energy by oxidizing sulfide in order to fix carbon for their hosts. Other Solemya species have been discovered near hydrothermal vents and cold-seeps; environments where chemosynthesis and bacterial symbiosis are common.

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