Report threads that break rules, are offensive, or contain fighting. Staff may not be aware of the forum abuse, and cannot do anything about it unless you tell us about it. click to
report forum abuse »
If one of the comments is offensive, please report the comment instead (there is a link in each comment to report it).
You can find out more by googling it.
You probably get covered in these microscopic animals every time you swim in the sea.
They produce half the Earth's oxygen. They provide food for other plankton and for krill shrimps.
They are useful and harmless. A good combination.