A person fell down when he went to play in the sea.
The blood seemed to have been cut off from the barnacles and blood was coming out from the knee, but the person thought that there was not a big deal had done just by pulling the bandage plaster.
Three months later, he felt something strange about his knee. Something is wrong with the movement of the knees and sounds lively.
Six months later, he felt a severe pain in his knee. That man thought that it was strange went to the hospital.
The doctor said that he did not know the cause, but he took a picture of the X - ray on his knee.
When I took an X - ray, surprisingly it was said that a barnacle was stuck to the dish of that person 's knee.
When the injured in the sea the barnacles' larvae entered the body, breeding at the back of the knee tray.