Analysis shows average levels are 30cm higher than thought, and up to 150cm in south-east Asia and Indo-Pacific

Sea levels around the world have been underestimated due to inaccurate modelling, with research suggesting ocean levels are far higher than previously understood.

The finding could significantly affect assessments of the future impacts of global heating and the effects on coastal settlements.

Supermarket chain says it will point customers to herring and other species to protect threatened Atlantic stocks

Waitrose has become the first UK supermarket to suspend the sale of mackerel because of overfishing and will start pointing customers toward herring and other species.

The Marine Conservation Society warned last year that stocks were at breaking point owing to overfishing, and it downgraded mackerel from a three to a four on its five-point Good Fish Guide sustainability scale.

Gene-altering chemicals found in humpback dolphins and finless porpoises, raising alarm they may end up in human food chain

Toxic e-waste chemicals from television, computer and smartphone screens have been found in the brains and bodies of endangered dolphins and porpoises in the South China Sea.

Research published in Environmental Science & Technology detected significant levels of gene-altering liquid crystal monomers (LCMs) in Indo-Pacific humpback dolphins and finless porpoises.