Approximately 8 million metric tons of plastic waste washes off land into the ocean each year. Bottle caps, toothbrushes, tiny plastic fragments, filaments, pellets, film and resin float about in the water columns.

Bernard Kloareg is the director of the Station biologique de Roscoff , a major science facility for marine research located in the Brittany region of France.

One litre of sea water contains about one billion bacteria.

In 2010, nearly two tons of fish was found dead due to lack of oxygen on the coastal line of the Romanian Black Sea.  Oxygen depletion , or hypoxia , occurring in the water is thought to be responsible.

By 2100 oceans, which are the largest store of carbon dioxide on the planet, are likely to be more acidic than at any time during the last 20 million years.