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On July 2018, one specimen of    Ichthyococcus   ovatus    (Cocco, 1838) was caught in the Strait of Sicily during the International Bottom Trawl Survey in the Mediterranean ( MEDITS ). The adult    I.   ovatus    measured 49 mm in total length and weighed 1.44 g. In this context, the presently reported study constitutes the first and deepest record of an adult of    I.   ovatus    as well as the morphometric description of its sagittal otoliths. In addition, we provide an age estimation as well as an update of the geographical distribution of this bathypelagic species around the Mediterranean Sea. Based on the growth increments of sagittal otoliths, the estimated age was five years. Specifically, the otolith from the presently reported specimen of    I.   ovatus    tended to be elliptic in shape related to aspect ratio and high rectangularity while circularity showed high complexity of otolith contour complexity. The absence of economic value of rarely reported species may underestimate their abundance. Therefore, more studies and research surveys would be necessary to fill the information gap on the biology of these deep-water species.

acta ichthyologica et piscatoria

﻿First record and otolith morphometric description of an adult lightfish,    Ichthyococcus   ovatus    (  Actinopterygii  :   Stomiiformes  :   Phosichthyidae  ), caught in the Strait of Sicily (central Mediterranean Sea)

﻿First record and otolith morphometric description of an adult lightfish, Ichthyococcus ovatus ( Actinopterygii : Stomiiformes : Phosichthyidae ), caught in the Strait of Sicily (central Mediterranean Sea)

First record and otolith morphometric description of an adult lightfish, Ichthyococcus ovatus ( Actinopterygii : Stomiiformes : Phosichthyidae ), caught in the Strait of Sicily (central Mediterranean Sea)