A wave is a communicated agitation. The water that composes the body of a wave does not move. If it did, when a stone is thrown into a pond and the ripples spread away in an ever-widening circle, there would appear at the center an everincreasing hole. No, the water that composes the body of a wave is stationary. Thus, you may watch a particular portion of the oceans surface and you will see the same water rise and fall a thousand times to the agitation communicated by a thousand successive waves.