Sea Foam at Fort Funston

Posted by The San Francisco Dog Walker

If you have been wondering about the origin of the foam you can often find on the beach during the summer, it has noting to do with soap suds.It is caused by the decaying remains of microscopic organisms in the sea.

Every spring the ocean has sudden bursts of life. Phytoplankton bloom starts at the end of March. After a couple of weeks tiny algae like diatoms occur in such numbers that the water becomes yellow-brown.