Southern Sand Smelt

Overview

The Southern Sand Smelt (Atherina hepsetus) is a small, gregarious fish belonging to the silverside family. It is widely recognized for its slender body and distinct silvery lateral stripe, often forming large schools in coastal environments.

Distribution & Habitat

This species is primarily found in the Mediterranean and Black Seas, as well as along the eastern Atlantic coasts of Spain, Morocco, and the Canary Islands. It thrives in shallow coastal waters and is highly adaptable, frequently entering estuaries and marine lagoons due to its tolerance for varying salinity levels. It is typically associated with sandy, rocky, or muddy substrates.

Appearance

Typically reaching an average length of 15 cm, this species rarely exceeds 20 cm. It features an elongated, slightly compressed body with small scales, a large eye, and a protractile mouth. Its coloration is characterized by a green to blue-green back, while the flanks are silver, highlighted by a prominent, bright silvery horizontal band.

Biology & Behavior

Southern Sand Smelts are highly social, spending their daylight hours in large, dense schools. As dusk approaches, these schools often disperse, allowing the fish to move closer to the shoreline to forage. They are harmless to humans and are considered a common sight in their native range.

Feeding

As a carnivore, the Southern Sand Smelt feeds primarily on zooplankton, including pelagic copepods, various larvae, small worms, and fish fry. In coastal lagoon environments, its diet may also include small benthic invertebrates.