Lynn Dao has allowed us to watch her fantastic video. Towards the end of her two week trip in New Zealand, she went with Dolphin Encounter in Kaikora to hop in the ocean and swim with a bunch of dolphins. She thought it was going to be amazing, but nothing prepared her for the surreal experience of swimming with a pod of 500 dusky dolphins!

Environmental columnist Sam Judd checks out the proposed controversial changes to areas for commercial harvesting for paua.

The 2012-13 State Ocean Swim Series, which offered the richest swimming prize in New Zealand history, came to a dramatic finish last weekend with Aussies Ky Hurst and Melissa Gorman sweeping the titles.

New Zealand's best open water swimmers are philosophical after conceding the recent State New Zealand Ocean Swim series to Australians, but still have much to look forward to in 2013.

Early in its life the moon was much closer to Earth and the tides were a lot bigger and more frequent.

Technically, Pink Floyd had it wrong. The space-facing side of the moon isn't dark. Not that you'd know that, given we always see the same side of our nearest neighbour.

It's reaching the business end of the State Ocean Swim Series.

Up to 900 dolphins have been killed by villagers in the Solomon Islands, who claim it was an act of retaliation for not being paid money they were promised.

A bid that would have safe-guarded the Ross Sea's pristine eco-system with the world's largest marine protected area has failed.

A Facebook campaign about plastic lollipop sticks has forced Chupa Chups to start a project that will change the product to a more sustainable material.

A two-and-a-half year expedition by the ship on which Sir Peter Blake was murdered continues his work under the oceans.

Sam Judd looks at the effect of plastic and toxins on marine life - particularly killer whales.

NIWA's research vessel Tangaroa recently returned from a 3-week voyage to the bottom of the ocean. Here's a look at the strange and stunning creatures they found.