Fiona Crouch of the Marine Biological Association of the UK, speaking during a survey as part of the launch of Shore Thing Ireland at Spiddal, Co Galway. Photograph: Joe O’Shaughnessy 3:58

Synthetic clothing, skin exfoliants and toothpaste may not sound too toxic, but to a lugworm or filter-feeding mussel they are lethal poison. (...)

Marine temperature records continue to show an overall upward trend, with Arctic sea-ice retreating and becoming thinner between 2007 and 2013.

European and Asian shipping may be using ice-free northern polar routes by the 2030s due to climate change, while anchovies, Chilean oysters, little e(...)

Sea change: Louise Firth experimented on the Mutton Island causeway. Photograph: Joe O’Shaughnessy

The world is changing faster than most of us realise. Humanity has been altering shorelines for a very long time, since the construction of the(...)