Why don't fingers go wrinkly in the sea?

Answer 1

Your skin gets wrinkly in water because of the difference in the partial pressures of the salts between your body and the water. Your body absorbs some of the water to attain a balance.

In ocean water, your skin doesn't get wrinkly, because ocean water is as salty - sometimes MOE salty - than your body is. So there's no transference.

Answer 2

Well, see most people say it's because of the salty water. Mostly in the bath tub or inside of a pool you get wrinkles because its all diffrent from salt water