Can water act as a barrier and prevent pregnancy?

Man is a land creature and knows little about the water. There are many myths about sex in water of which the most common is that that the female cannot get pregnant during water sex. Rest assured, sperms do not differentiate between water and the mattress at home. Sperms can swim all the way up the vagina and fertilize the egg when the opportunity is ripe. Water has never been advocated as a contraceptive and many women who have gotten pregnant while having sex in water will attest to that fact. If water was a great contraceptive, there would be no sea creatures living today