The Ocean of Blood is a large body of liquid. The liquid it contains is red like blood. In fact, it is more accurate to say that the Ocean of Blood is made of blood.
But from their perspective, the Ocean of Blood doesn't look like an ocean. It is more like a lake of blood. It is a large lake, but it is not an ocean.
The reason that they haven't approached the Ocean of Blood is that there is a golden giant next to it. The giant is naked, so they can see that it doesn't possess any sexual characteristics.
The golden giant doesn't seem to possess any skin. Its muscles also seem to be made of golden blocks of metal.
So one might think that the giant is not a living being. From its appearance, it is easy to think that the giant was carved from some kind of golden rock.
