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You beat me to it.
My recommendations:
1. Don't stick your head in a shark's open mouth
2. Don't lie down on top of a stingray
3. Don't grap a hold of a sea urchin
4. Don't wiggle your finger in front of moray eel
5. Don't carry a string of dead fish
6. Don't rub yourself all over fire coral
7. Don't handle sea snakes
8. Don't wrap yourself in jellyfish tentacles
Help me out folks, am I missing anything?