menidia

Menidia is a genus of small, silvery fish belonging to the family Atherinopsidae, commonly known as silversides. These fish are native to the Atlantic coast of North America, ranging from Nova Scotia to Florida, and also inhabit the Gulf of Mexico. Menidia species are typically found in shallow, nearshore waters, including bays, estuaries, and salt marshes, often in large schools.

These fish are characterized by their slender bodies, two dorsal fins, and a prominent lateral stripe. They are generally small, with most species reaching lengths of only a few inches. Menidia play an important role in their ecosystem, serving as a food source for a variety of larger fish, birds, and marine mammals. Their diet consists mainly of plankton and small invertebrates.

Several species are recognized within the genus Menidia, including the Atlantic silverside (Menidia menidia) and the inland silverside (Menidia beryllina). The inland silverside, despite its name, can be found in both brackish and freshwater environments, extending its range inland. Menidia are often used as indicator species for monitoring water quality due to their sensitivity to pollution. They are also sometimes used in aquaculture and as bait.