There are a variety of water safety signs that you and your child should be aware of and seek out whenever they you are near a body of water of any kind. Prohibition signs are generally black and red on a white background and tell you not to do something. An example of a prohibition safety sign is shown below.
Hazard signs warn of potential dangers or hazards and are usually black text with a yellow background, such as shown below:
Information signs are not strictly safety signs but can give information about the current conditions at your location, an example is shown below:
Being aware on the dangers and hazards that might come up whilst around water is one of the things you can do to ensure safety for yourself and your children. Always obey whatever water safety signs you see and if you are confused ask a lifeguard.