- A growing “dead zone” in the middle of the Arabian Sea has allowed plankton uniquely suited to low- oxygen water to take over the base of the food chain. Their rise to dominance over the last decade could be disastrous for the predator fish that sustain 120 million people living on the sea’s edge. http://www.ldeo.columbia.edu/news-events/shift-arabian-sea-plankton-may-threaten-fisheries 48 comments science