Upper Adriatic are:

The Adriatic Sea, compared to the other basins, shows peculiar characteristics.  It is a moderately shallow sea especially in the northern part. The environmental characteristics of the Upper Adriatic are:

flat and sandy coast
presence of (artificial) breakwater rocks arranged along the entire coast a few meters from the beach which over the years have given shelter to many animals allowing the formation of "environmental oases" for many fish and invertebrates of the benthos group
low salinity due to the large contributions of fresh water from the numerous rivers that flow into the Adriatic Sea
high temperatures are reached in summer, very low in winter (compared to the rest of the Mediterranean)