The Great Barrier Reef in Australia: The past 10 years have been the warmest 10 on record for global ocean temperatures.  Photograph: Reinhard Dirscherl\ullstein bild via Getty Images

Last year was the warmest year on record for the world’s oceans, part of a long-term warming trend, according to a study released on Monday. “If you(...)

A message in a bottle  washed up more than 108 years after it was thrown into the sea has been confirmed as the world’s oldest. Photograph: Marine Biological Association/PA Wire

When the distinguished marine biologist threw his message in a bottle into the sea, asking whoever found it to contact him, he wasn’t expecting a spee(...)

An undated handout photo of Inky the octopus at National Aquarium of New Zealand in Napier. Aquarium keepers noticed Inky had escaped when they came to work and discovered that he was not in his tank in early 2016. Photograph: National Aquarium of New Zealand via The New York Times

It was an audacious nighttime escape. After busting through an enclosure, the nimble contortionist appears to have quietly crossed the floor, slither(...)

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

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