Seafoam is the mixing of air and seawater due to windy conditions or breaking waves. It is made up of salts from seawater, proteins, dead plankton, and other organic matter floating on the surface of the sea. Air injection and churning up all these components to blend into a foamy substance is made possible by strong winds blowing across the water. The sea foam can sometimes be fluid and light, sometimes sticky and greasy. It commonly accumulates along beaches like Rossall after it has been deposited by waves. Big sea foam events sometimes may be indicative of a coming storm.
Notwithstanding its dramatic look, the sea foam phenomenon is quite a natural one and not usually harmful to human beings and the environment. Some fish even use the foamy cover to hide from predators.
At Rossall Beach this morning:
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