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The 96-year-old naturalist will appear in a new documentary that looks at the people in the UK trying to fight against the decline in nature

Marine Conservation Society calls for better regulation of how north-east Atlantic mackerel is caught as stocks decline

How deep can fish live in the ocean? That question has captivated me for more than a decade. But my research team’s discovery of the deepest sea fish, announced this week, might not be the final answer. There may be more. How deep – and how strange – remains open…

Dave Perkins was fishing with two customers off the Florida coast when they decided to reel in a blacktip shark that had been chasing away their fish

The 14ft female smalltooth sand tiger shark is at the upper end of the size limits for the species

A tourist was walking near Kilmore Quay in Wexford when they came across the extremely rare sight. They contacted scientists who 'couldn't believe' it was a 14-ft smalltooth sand tiger shark.

Drone operator Nick McCaffrey had no idea how rare the footage was until he shared it with Emily Hague, a marine mammal researcher at Heriot-Watt University in Edinburgh

Juvenile fish is about the size of a human palm and covered in scaleless translucent skin

The population of Canada’s southern resident killer whales in the Salish Sea off British Columbia has been declining for over 30 years.