While sea foam often comes from natural sources, it can also form from pollutants, such as agricultural runoff, fertilisers, and sewage, and sometimes carries harmful toxins that can affect humans and animals.

While sea foam often comes from natural sources, it can also form from pollutants, such as agricultural runoff, fertilisers, and sewage, and sometimes carries harmful toxins that can affect humans and animals.

While sea foam often comes from natural sources, it can also form from pollutants, such as agricultural runoff, fertilisers, and sewage, and sometimes carries harmful toxins that can affect humans and animals. Much sea foam is produced by diatoms and by a type of mixoplankton called Phaeocystis which can grow in mucus colonies; while those colonies give protection against being eaten by zooplankton, the mucus also prevents Phaeocystis from eating, so in this state it grows like a phytoplankton. Some other mixoplankton use this mucus to make traps to engulf their prey. More information: https://science.howstuffworks.com/environmental/earth/oceanography/sea-foam.htm