The blue mackerel has a spindle-shaped body, narrow at the top of the head that widens toward the middle of the body and narrows again toward the tail fin.

 

The tail fin is protruding at the top and bottom and is deeply incised in the middle. Her back is greenish brown with vertical dark lines. It is difficult to distinguish it from mackerel, it has greyish spots on the ventral and lateral part, which are mother-of-pearl in the mackerel, and it has a significantly larger eye than the mackerel. It lives at depths of 300 meters, during the day it stays closer to the bottom, and at dusk it migrates to the surface.

 

The mackerel is a predator that feeds on various marine animals, sardines, anchovies, shrimps, and other small fish. Along with the mackerel, it is the only mackerel in the Adriatic that feeds by filtering plankton.