This study histologically describes the intersexuality of Scomberomorus niphonius collected from the coastal area near Jeju Island. A total of 126 S. niphonius, collected from March to July 2012 with a total length of 62.4 cm (±17.5) and a total weight of 1,701.9 g (±1,528.9) were used for analyses. From a histological perspective, two types of intersex were confirmed. One type had scattered germ cells from the opposite sex within the gonad. The second type developed germ cells from the opposite sex in the connective tissue of the outer gonadal membrane. The intersexuality was 14.3% (n=18/126), with females (21.3%; n=16/75) exhibiting a higher rate than males (3.9%; n=2/51). There was no displayed correlation between intersexuality and the total length and weight.

• Jong Bin Kim(Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute,)
• Dae Soo Chang(Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute, NFRDI)
• Hyejin Kim(Department of Aqualife Medicine, Chonnam National University)
• Mi Ae Jeon(Department of Aqualife Medicine, Chonnam National University)
• Kayeon Ku(Department of Aqualife Medicine, Chonnam National University)
• Jung Sick Lee(Department of Aqualife Medicine, Chonnam National University) Corresponding Author