Morphology: Its body has an elongated shape, quite compressed, slender, like all fast fish. Its head is of a typical predator and its eyes are lively and kinetic. Its mouth is wide, armed with teeth. On its back there is a first fin supported by thorny rays, while the second fin is soft but strong. The caudal fin is almost bilobed with a concave tip. Its body is covered with glossy, silver scales – white on the belly – while the spine is grey and sometimes very dark. It is a species that can survive and grow in a wide range of temperature and salinity.
Physical presence: Mainly Mediterranean Sea (endemic species), Black Sea and northeastern Atlantic Ocean.