A total of 163 (66.0 %) Staphylococcus isolates and 52 (21.0 %) Enterococcus isolates were isolated from 247 fish samples consisting of Atlantic salmon (Salmo salar), Atlantic bonito (Sarda sarda), Sea trout (Salmo trutta), and European seabass (Dicentrararchus labrax). The Staphylococcus isolates were identified as S. aureus (8.0 %), S. intermedius (6.7 %), S. warneri (32.0 %), S. hemolyticus (22.7 %), S. saprophyticus (7.4 %), S. simulans (5.5 %), S. capitis (5.5 %), S. xylosus (4.9 %), S. epidermidis (4.3 %), S. schleiferi (1.8 %) and S. caprae (1.2 %). The Enterococcus isolates were identified as E. faecalis (46.1 %), E. avium (25.0 %), E. solitarius (11.5 %), E. gallinarium (7.7 %), E. casseliflavus (6.0 %), E. maladoratus (1.9 %), and E. flavescens (1.9 %). The majority of Staphylococcus strains had biofilm formation (93.8 %), lipase production (89.6 %), slime production (84.0 %), hemolytic activity (69.9 %), DNase activity (63.1 %) and protease production (57.0 %). Biofilm formation, slime formation, DNase activity, proteolysis, and hemolysis were detected in 94.2 %, 90.3 %, 57.7 %, 36.5 %, and 3.8 % of Enterococcus strains, respectively. None of the Enterococcus species had lipolytic activity.