Hi Friends.

If you are good swimmer and don't know your limits. then read the following article.

Swimming can be a lot of fun and you might want to stay in the water as long as possible. If you're not a good swimmer or you're just learning to swim, don't go in water that's so deep you can't touch the bottom and don't try to keep up with skilled swimmers. That can be hard, especially when your friends are challenging you - but it's a pretty sure bet they'd rather have you safe and alive.

If you are a good swimmer and have had lessons, keep an eye on friends who aren't as comfortable or as skilled as you are. If it seems like they (or you) are getting tired or a little uneasy, suggest that you take a break from swimming for a while.
Thanks.