The reproductive biology of 389 specimens of Aspitrigla obscura (Family: Triglidae) obtained from catches collected by gill and trammel nets from Dernah coast, eastern Libya, Mediterranean Sea, was established during a one year study period (April, 2013 to January 2014). There were monthly variations in sex ratio between males (193 fish = 49.6%) and females (196 fish = 50.4%). The overall sex ratio was 1: 1.02 in favor of females. The breeding season extended from December to May. Oocyte diameters increased gradually and progressively during October (87 ± 4.27 μm) to December (250 ± 40.38 μm), then recorded highest values of 367 ± 41.39 in January to 567 ± 21.14 in May. The average absolute fecundity ranged from 535±33.9 in October to 8891±1231.4 in May for fish of total length ranging from 19.1 to 33.9 cm.. Overall absolute fecundity was 5875±503.1, whereas overall relative fecundity was 176±23.3cm-1.
Keywords: Aspitrigla Obscura, Mediterranean Sea, Reproductive Biology, Triglidae, eastern Libya, the Long Fin Gurnard
