Dipturus Batis

The common skate (Dipturus batis), also known as the blue skate, is the largest skate in the world, attaining a length of up to 2.85 m (9 ft 4 in). 

The common skate can reach an estimated age of 50–100 years and maturity is reached when about 11 years old.

Endangered species in Croatia, it can be found rarely in the Adriatic. The biology of The common skate IS little known. It is a sluggish and inactive fish. It reproduces in groups. The females place the cocoons on the bottom mostly in spring and summer.