The conger eel has a long, cylindrical body and smooth, scaleless skin. The dorsal fin starts just above the tip of the pointed pectoral fins and runs the length of the body, joining with the tail and anal fins. Two small, tube-like nostrils are conspicuous on the tip of the snout. Congers are usually slatey blue in colour with a lighter underside. They are large marine eels that can grow to approximately 2.75m in length although most are less than 2m. Juvenile congers might sometimes be confused with the common eel (Anguilla anguilla
) however the latter has rounded pectoral fins and the dorsal fin starts much further back on the body.