Idol group Super Junior's Eunhyuk showed off his abs.

Yesterday, Eunhyuk posted on his Twitter, "Swim swim swim~" along with a picture.

In the picture, Eunhyuk is making a V with his fingers at the camera with his shirt off. Even though the picture was taken from far away, his abs were clearly shown.

Internet users who saw this commented, "I didn't know Eunhyuk was that fit" and "Hope you have a good time."

Photo Credit: Eunhyuk Twitter