“…In the present study, the weight of the sagitta in the E. tetradactylum is increased with the growth of total body length of the individuals in the young male groups with smaller body size (i.e., the sagitta weight in group I fishes is lesser than that in the group II), while this increment of the otolith weight is restricted in the mature male group with larger body size (i.e., the sagitta weight in the group III fishes is almost similar to that in the group IV). Furthermore, the morphometric measurements of the sagitta in E. tetradactylum reveal that the length of the otolith is significantly related to the total body length of the fishes instead of the otolith width and also reported in other fish families such as Nototheniidae (Lombarte et al, 1991), Merluccidae (Lombarte & Lleonart, 1993); Labridae (Skeljo & Ferri, 2012); Cyprinidae (Kontaş & Bostanci, 2015), Sparidae (Khedher & Fatnassi, 2018), Sciaenidae (Carvalho et al, 2020). It is assumed that the sagitta formation in fishes may be completed at a certain body length due to constant weight.…”