Answer:
The Centrifugal force makes the seawater to bulge at the equator when compared to the seawater at the poles.
Explanation:
The centrifugal force drives the earth rotation due to the bulging known as the equatorial bulging. But it is a different effect from tidal bulging.
Relatively the tidal effects are caused by the gravitational gradients that mean the differences in the gravity from one point to another point in the earth.
So centrifugal force is the reason for the bulge of seawater at the equator.