If you accidentally step on coral, your first priority is to stop moving and float horizontally to prevent further damage to the reef and yourself. Coral is a delicate living colony of polyps; stepping on it can crush these organisms and introduce bacteria that lead to "coral bleaching" or death. From a personal safety standpoint, coral is often razor-sharp and can cause deep lacerations. Because coral is covered in a layer of biological mucus, these cuts are highly prone to infection. You should immediately exit the water and wash the wound with fresh water and soap. In 2026, many dive shops recommend using white vinegar or isopropyl alcohol to neutralize any stinging cells or bacteria left in the wound. If the cut is deep or shows signs of swelling and redness, you should seek medical attention, as "coral poisoning" can lead to chronic inflammation. To prevent this in the future, always maintain a horizontal "trim" while snorkeling, never stand up in shallow water unless you are on a designated sandy patch, and wear fins only when you are in deep enough water to avoid accidental contact.