Not unless they hated the person ....murder without the jailtime(;

Look at it this way, can you taste the difference between shrimp and chicken? Fish and beef? So can they. They don't Want to eat us, and 99.9% of the time they won't. Also, if you're going on a diving trip and you're afraid you likely aren't That experienced, therefore you'll likely be in relatively shallow waters, and great whites are Huge, therefore you have a better chance of meeting the little mermaid than a great white in roughly shallow waters, you should be fine in and around a coral reef or something of the like. If you meet Any sharks they'll most likely be reef sharks or basking sharks, and they're not computer programmed killers, they're creatures. They aren't always looking to eat, and as far as signs to look out for, a good rule of thumb is a more or less straight, relaxed body, and roughly level fins is okay, an arched back and lowered fins means you've made the shark uncomfortable, likely by entering their territory, just move away.

There are other creatures in the sea, if sharks killed like nuclear bombs do you think that would be possible? Also, back on jaws, the shark was a grossly over exaggerated size that was impossibly fast, not remotely possible. Basically you'll be fine, just stick with your guide and enjoy the beauty and wonder of the ocean