Brook Silverside

Labidesthes sicculus

The brook silverside (Labidesthes sicculus) is a slender freshwater fish in the family Atherinopsidae. Adults reach about 6-10 cm with an extremely slender, translucent body showing a prominent silver lateral stripe. The head features a distinctive elongated, upward-pointing snout adapted for surface feeding. This species inhabits clear, calm waters of lakes, ponds, and slow-moving streams at depths of 0-3 meters across eastern North America, from the Great Lakes to the Gulf Coast. Brook silversides are surface-oriented fish, forming shimmering schools near the water surface where they feed primarily on small insects, both aquatic and terrestrial. They have a short lifespan of only about one year. Their translucent bodies and surface-dwelling habits create beautiful light effects when seen from below. Despite their small size, they are ecologically important as both predators of small invertebrates and prey for larger fish and wading birds.