Unionidae

Sun, 03 May 2026 13:18:57 +0000

# Understanding Unionidae: The Freshwater Mussels You Should Know Unionidae, commonly known as freshwater mussels, are a fascinating and ecologically vital group of aquatic organisms. Belonging to the family Unionidae within the order Bivalvia, these soft-shelled mollusks play a critical role in freshwater ecosystems across North America, Europe, Asia, and beyond. Often overlooked, Unionidae species are essential indicators of water quality and biodiversity. In this SEO-optimized article, we explore what Unionidae is, why these mussels matter, their ecological importance, conservation status, and how you can help protect them. ## What is Unionidae? Unionidae is a family of freshwater mussels characterized by their bivalve shells, muscular feet, and sedentary lifestyle. Unlike clams, most Unionidae species live embedded in river or stream sediments, where they filter water and support healthy aquatic habitats. With over 300 living species worldwide, the majority are found in North America, making Unionidae one of the most diverse and range-specific freshwater mollusk families.