Mediterranean sand eel

Marine fish with regularly ossified skeleton. Elongated, slightly compressed body, covered with very small scales. Bearded head, with the upper jaw very protractil. Lateral line with small diverticula. A dorsal fin, long, sinuous profile; anal fin half as long as the dorsal. Small pectoral fins, inserted near the abdominal profile. No pelvic fins. Light brown color on the back, silver flanks. Up to 20 cm in length.