1. There the sea jellyfish, pay attention, do not be stung to the large jellyfish sting can help people unconscious.
    [Added: jellyfish are deadly dangerous if large. ]
2. Best not to go swim at low tide, it is easy rolling pin.
    [Added: Tuizhao have a lot of potential members of the shore, the shore to swim in the time to note that there is no problem in deep-sea]
3. Head swim in the water: waves to much when you play with a point force to head higher. For example: the breaststroke in arm bigger force.
    [Added: If there really how high the waves to the stage to no avail, the best way is to hold your breath, so the waves have passed too late in the breath. ]
4. Do not use when big waves freestyle backstroke, and will be submerged. Butterfly or breaststroke with it. Of course, the effort along the tour.
    [Added: less is best when the sea waves, the risk coefficient is too high. ]
5. Swimming in the sea does not mean you have conquered the sea, the sea embraces you. The vast sea, deep scary, especially a man, when swim in the sea. Best travel along the beach, remember an old saying goes: "Water will drown."
[Added:
6: If you are tired swim in the sea, this time not to tread water, so you will be more tired, then you should lie flat at sea level on the body, head thrown back, recovered the body such as a short break and then continue to travel, do Do not force the body, if a very bad cramps. ]