What is the purpose of the initial gentle rinse using seawater following contact with a Man-o'-War?

Answer

To wash away any loose tentacles without causing further envenomation.

The very first action taken after realizing a sting has occurred is rinsing the area, and the choice of rinsing agent is crucial. Seawater is recommended for this preliminary step because it possesses an osmotic balance similar to the creature's natural environment. A gentle application of seawater helps to safely wash away any tentacles or remnants that are still loosely clinging to the skin. Crucially, unlike fresh water, seawater does not trigger the undischarged nematocysts to fire, thus preventing the introduction of more venom while clearing superficial debris.

What is the purpose of the initial gentle rinse using seawater following contact with a Man-o'-War?
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