Save the whale? After watching this documentary about the mistreatment of killer whales, you'll never mock that sentiment again. Gabriela Cowperthwaite's sobering film recounts the story of Tilikum, an orca snatched from its mother as a calf and set to work entertaining the public at SeaWorld, an aquatic theme park in Florida.

A £2,000 reward has been offered to trace suspects who killed a young dolphin in a hit-and-run boating incident.

It was the size of a bus, and sea-loving Bishan Rajapakse came off worst

Necklaces made from whale ivory and fish hooks of ivory, pearl and turtle shell were part of a lavish system of gifts between Fiji’s chiefs and their first British governor in the nineteenth century.

An ordinary superwoman who broke the mould

Hundreds of starving sea lion pups are washing up on beaches in Southern California, overwhelming rescue centres and leaving scientists scrambling to figure out why.

A 36ft long humpback whale found dead in the Thames Estuary this morning is being examined after being brought to shore.

Ingenious use for an unwanted royal tribute – offload it on a passing tsar

The navy has reportedly lost three of its carefully trained “killer” dolphins. The defence ministry has denied the reports and refused to confirm that its navy uses dolphins, but the loss has been widely reported in the country, and former naval officers said dolphins often went missing during exercises to look for mates.

More time and money will be needed to remove the Costa Concordia from the rocks off Tuscany where it capsized last year, in part to ensure the toxic materials still trapped inside don't leak into the surrounding marine sanctuary when it is righted, officials said yesterday.

Sudan says he's an Israeli operative – but his handlers say he's too easily distracted for that. Matthew Kalman reports on a spy thriller

Some dolphins used by the US Navy to track down mines will soon lose their jobs to robots – but they will be reassigned, not retired.

Any lingering ill effects on the victim have long passed - but after a two month search, police have finally located the perpetrator. Ana Gloria Garcia Gutierrez, 53, the woman who illegally clambered on to and rode a manatee, was arrested Saturday. She faces a maximum of six months in jail and a fine of $500.

Chocó department, on Colombia’s Pacific coast, is one of the wettest places on Earth. It rains all the time. The small group that I was with was visiting a community tourism project, Mano Cambiada, based in the town of Nuquí. The warning that, on the boat journey to Mano Cambiada’s lodge, we might get wet was an understatement. A little short of two hours in, in our small boat on the open sea, we were drenched to the skin.