It is not gibberish if you studied physics at school. Water surface remains on the same level of potential energy of gravitational field, othewise it won’t be t

It is not gibberish if you studied physics at school. Water surface remains on the same level of potential energy of gravitational field, othewise it won’t be the state with minimum energy. This means that if the field has complex form, the water surface won’t be ellipsoid. If the pull is stronger, you can expect a bulge, if the pull is weaker, there will be a hole and the depth of that hole can be bigger than the tidal amplitude, because why not. EDIT: also, in case of Indian Ocean, it is not a hole, just slightly different curvature.