Actually our Arabian sea not clear water at all so you can just put your feet is ok, by the way you can visit saurashtra costal area there are the beaches truly clear.
Beach bahut ganda hai, bahut kachra faila rakha hai, yaha ke log bhi bahut khadus hai. Ise accha hai kathiyavad jav, Somnath, dwarka , Diu waha par clean beach hai, never go daman very bad.