Red Globe

What is it?

Got up early and when I peeked out I suddenly saw the sun appear over the sea. Grabbed my camera and took 2 shots.

Later, when I previewed them in the camera I noticed the red globe above the sun but it was only in one of the shots. I'm a bit baffled as to whether it's a reflection of the sun bouncing off the water or it is caused by the camera lens.