[LibFreeOrDie]

the foam is created by impurities in the ocean, such as salts, chemicals, dead plants, decomposed fish and excretions from seaweed.

Uh, how could salts, fish, and seaweed be impurities? Wouldn't be much of an ocean without 'em!

[Chickensoup]

To make bubbles like that it would almost have to make a soap which would mean some sort of fat.