The study, published this week in the journal Science , showed that the world's oceans have got much warmer since the 1960s. But what happens when the oceans get warmer, and what does it mean for us? Almost three-quarters of the world's coral reefs were affected by those heat waves and experts say warmer oceans mean these sorts of die offs will become much more common. Food securityFish species respond to warmer oceans by migrating to cooler areas, says Simpson. While scientists say the new paper shows an alarming rate of increase in ocean temperatures, Simpson sees one chink of light.

Source: CNN January 12, 2019 09:32 UTC