Hot water immersion is recommended for which marine injuries?

Hot water immersion is recommended for which marine injuries?

• A. Catfish, lionfish, stingray, Portuguese man of war
• B. Sharks
• C. Jellyfish only
• D. Sea urchins

Answer: (A)

Hot water immersion works because many marine venoms are proteins that are heat-labile, meaning they lose their damaging activity when exposed to heat. Immersing the affected area in water around 42–45°C for about 20 minutes denatures these venom proteins and provides quick pain relief, while also helping to limit further toxin spread. The injuries from catfish, lionfish, stingray, and Portuguese man-of-war injections all involve such heat-sensitive venoms, so hot-water treatment is a well-supported first-aid measure for them. In contrast, shark injuries are typically mechanical bites rather than venomous envenomation, so hot-water immersion isn’t the primary treatment for those.

Hot water immersion works because many marine venoms are proteins that are heat-labile, meaning they lose their damaging activity when exposed to heat. Immersing the affected area in water around 42–45°C for about 20 minutes denatures these venom proteins and provides quick pain relief, while also helping to limit further toxin spread. The injuries from catfish, lionfish, stingray, and Portuguese man-of-war injections all involve such heat-sensitive venoms, so hot-water treatment is a well-supported first-aid measure for them. In contrast, shark injuries are typically mechanical bites rather than venomous envenomation, so hot-water immersion isn’t the primary treatment for those.