Once thought to be only the realm of the blue-ringed octopus, researchers have now shown that all octopuses and cuttlefish, and some squid are venomous. The work indicates that they all share a common, ancient venomous ancestor and highlights new avenues for drug discovery.
New calculations made by marine chemists from the Monterey Bay Aquarium Research Institute (MBARI) suggest that low-oxygen "dead zones" in the ocean could expand significantly over the next century. These predictions are based on the fact that, as more and more carbon dioxide dissolves from the atmosphere into the ocean, marine animals will need more oxygen to survive.
BBC: 'Arctic unicorns' in icy display
Remarkable footage of elusive narwhal has been captured. A BBC team used aerial cameras to film the creatures during their epic summer migration, as they navigated through cracks in the melting Arctic sea ice.
Vancouver Sun: B.C. loses salmon farm jurisdiction
Provincial supreme court rules the province has been improperly regulating industry.
Some whales show damage suggesting they surfaced too quickly, experts say
Increasing noise pollution in the world's oceans is threatening the survival of whales and dolphins, a UN-backed conference has heard.
Experts say the noises sea creatures use to communicate are being drowned out by noises from commercial shipping, new military sonar and climate change.
They become disoriented, cannot find mates or food and behave differently, scientists say.
Suggestions to cut noise include installing quieter engines.