* The water is relatively clear. The water in the ocean is not as murky as it may seem. In fact, it is actually very clear, and we are able to see through it because of the way that light travels through water.
* The light is scattered by the water molecules. When light hits water molecules, it is scattered in all directions. This means that some of the light that enters the water is scattered back towards us, and this is what allows us to see through the water.
* The color of the water. The color of the water can also affect how well we can see through it. For example, blue water is more difficult to see through than clear water, and this is because the blue light is absorbed more easily by the water molecules.
In addition to these reasons, there are also a few other factors that can affect our ability to see through water in the ocean. These include the depth of the water, the amount of sunlight, and the presence of waves.