The shark with the hammer-shaped head (Sphyrna zygaena) is a big eater and is potentially dangerous to humans. It has been found in New Zealand coastal waters, in up to 110 metres of water, and on the continental shelf. It is more commonly seen around the North Island.

A historic agreement, aimed at improving country-to-country collaboration on marine research, observations and data management between New Zealand and Australia, has been signed in Canberra this morning.

NIWA is using forecast models to show us the offshore conditions around the grounded Rena, and the likely path of the oil plume, as fuel oil washes up on Bay of Plenty beaches.

NIWA's research vessel Tangaroa has just completed a very successful voyage of habitats of significance for marine organisms and biodiversity. "We were amazed by what we saw," says NIWA's Dr Mark Morrison, programme leader.

Over 42 days, split across two voyages, the Tangaroa worked its way down the country and back, working 24 hours a day, seven days a week. It surveyed habitat and biodiversity hotspots around New Zealand's expansive continental shelf.

NIWA Chairman Chris Mace says New Zealand urgently needs a National Oceans Strategy, to sustainably manage and use its extensive marine resources to boost the economy. 

"There is huge untapped potential in our oceans and coastal waters, and the Government has clearly indicated their intention to increase the use of these resources. Under the current global economic environment, I think that is prudent. But without an integrated oceans strategy, our ability to sustainably manage those resources will clearly be compromised."

New Zealand is bang in the middle of the biggest and wildest waters on the planet: the Southern Ocean. Many of New Zealand’s coasts and coastal communities are already facing the impact of rising sea levels. Will the future see even bigger storms and waves, putting our increasingly intensive development of coastal areas dramatically at risk?

NIWA Oceanographer Dr Craig Stevens has returned, with stunning images and data, from a successful month-long research trip in Antarctica, where he led a team of international and New Zealand scientists.

Preliminary results from the first comprehensive survey of the Cook Strait Canyon seabed have begun to reveal tantalising scientific secrets about New Zealand's largest underwater canyon.

On New Year's Day, NIWA's research vessel Tangaroa departs for its first voyage, since its recent $20 million dollar upgrade, making its twentieth consecutive trip to the Chatham Rise to study the abundance of important fish species.