Much like human skin, a plant has a tissue system which consists of a group of cells that work together for a very specific function and forms the first line of defense against physical damage and disease
This tissue system is called the dermal tissue system, and it is the plant's outer protective coating
The dermal system itself consists of a layer of tightly packed cells called the epidermis
Epidermis regulates exchange of gases and and acts as a protective barrier against any injury or infection
The epidermis in turn is covered with a waxy coating called the cuticle, which helps prevent water loss through the epidermis
All I will say, since I’m not going to write the whole paragraph for you, is that I’m pretty sure ocean water contains salt, which doesn’t allow you to get the proper nutrition from water.