The disciples became terrified when they saw Jesus walking on the sea because

The disciples became terrified when they saw Jesus walking on the sea because they thought He was a ghost. In the Gospel of Matthew, it is recorded that the disciples were in a boat on the sea when a great storm arose. They saw Jesus walking on the water towards them, and because they had never seen anything like it before, they thought He was a ghost. This caused them to become even more frightened. Although the other options could also be possible causes of fear in a different situation, the biblical account specifically states that the disciples thought Jesus was a ghost. They were not expecting to see Him walking on the water, and their minds could not comprehend how it was possible. It was not until Jesus spoke to them and reassured them that they recognized Him and their fear subsided.