What do you have to watch out for when swimming?
Do not go into the water during sunset and at night. The fish come closer to the shore during the early hours, not like during the day.
Do not wear anything shinny. It could provoke a shark attack.
Do not go into the water if you are injured or if you have some cuts on your body, even if they are minor cuts.
Do not swim if you see a school of fish close to the shore. Wherever the small fish are, most likely the predators are there too, and they can very easily attack humans as well.
Do not pee in the water. The shark has a very sensitive nose and can easily attack you.
When you go into the water, start swimming as soon as you can. Make sure you stand the least amount of time. Why? Accidentally you can very easily kick or hit the shark and he can attack you.
When you swim, try not to splash the water too much.
If you see a dead animal floating do not go around it or near it. Most likely predators are feeding off the dead body.
These are only a few tips, but it can help you avoid getting bit or even save your life.