Ocean ridges are generally located along the mid-oceanic ridges, which are underwater mountain ranges that extend for thousands of kilometers across the ocean floor. These ridges are found:

* In all the major oceans: Atlantic, Pacific, Indian, Arctic, and Southern Oceans.

* Near the center of the ocean basins: They are essentially the "seams" where tectonic plates are pulling apart.

Think of them like giant underwater seams where new ocean floor is being created!