saltwater
Atlantic Silverside
Menidia menidia
Elongated, slender body with a distinctive silvery-white stripe running along each flank from head to tail. The back is greenish-translucent, and the belly is silvery-white. They have two dorsal fins, a forked caudal fin, and a relatively small mouth.
- Habitat
- Inshore marine and estuarine waters, often found in shal…
- Size & weight
- Typical adult size ranges from 6 to 10 cm (2.4 to 3.9 in…
- Diet
- Feeds primarily on zooplankton, small crustaceans like c…
Identified More saltwater →
Learn more about Atlantic Silverside in the encyclopedia →Identify your own catch.
Get a report just like this from any photo, free.
Physical characteristics
Elongated, slender body with a distinctive silvery-white stripe running along each flank from head to tail. The back is greenish-translucent, and the belly is silvery-white. They have two dorsal fins, a forked caudal fin, and a relatively small mouth.
Habitat & distribution
Inshore marine and estuarine waters, often found in shallow bays, salt marshes, tidal creeks, and sandy beaches along the Atlantic coast of North America.
Behavior
Highly social species that typically forms large, active schools near the surface of the water in shallow coastal areas to deter predators.
Diet
Feeds primarily on zooplankton, small crustaceans like copepods, amphipods, insect larvae, and microscopic algae.
Reproduction
Spawning occurs in shallow coastal waters and intertidal zones during the spring and summer months. Females deposit adhesive eggs on aquatic vegetation, submerged debris, or sand.
Ecological role
Serve as a crucial forage fish forming a vital link in the marine food web, transferring energy from zooplankton to numerous larger predatory fish, seabirds, and marine mammals.
Similar species
Inland Silverside (Menidia beryllina) and Rough Silverside (Membras martinica), which can be distinguished by subtle differences in scale counts, body depth, and geographic distribution ranges.
Identification tips
Look for the elongated, translucent greenish body featuring a bright, reflective silver lateral stripe and schooling behavior near the water surface in shallow marine environments.
Interesting facts
Atlantic silversides play a massive role in coastal ecosystems as one of the most abundant small fish species and exhibit rapid growth rates, completing most of their life cycle within a single year.