question: Whale watching in New Zealand is predominantly centered around the areas of Kaikoura and the Hauraki Gulf, the Hauraki Gulf Marine Park (just outside Auckland city) is also a significant whale watching area with a resident population including which toothed whale belonging to the oceanic dolphin family, of which it is the largest member?
answer: Orca
context: Title: Kaikoura Island
  Passage: Kaikoura Island (formerly known as Selwyn Island) lies in an irregularly-shaped bay on the western side of Great Barrier Island in the Hauraki Gulf in New Zealand, 90 km north east of Auckland.  Kaikoura Island is the seventh largest island in the Hauraki Gulf.  It is 80 metres from Great Barrier Island at its closest point and forms the natural harbours of Port FitzRoy and Port Abercrombie.  Its biota includes the endangered brown teal duck, the North Island kaka and many native trees and shrubs.
  Title: Whale watching in New Zealand
  Passage: Whale watching in New Zealand is predominantly centered around the areas of Kaikoura and the Hauraki Gulf.  Known as the 'whale capital', Kaikoura is a world-famous whale watching site, in particular for sperm whales which is currently the most abundant of large whales in New Zealand waters.  The Hauraki Gulf Marine Park (just outside Auckland city) is also a significant whale watching area with a resident population of Bryde's Whales commonly viewed alongside other cetaceans Common Dolphins, Bottlenose Dolphins and Orca.  Whale watching is also offered in other locations, often as eco-tours and in conjunction with dolphin watching.  Land-based whale watching from New Zealand's last whaling station, which closed in 1964, is undertaken for scientific purposes, mostly by ex-whalers.  Some compilations of sighting footages are available on YouTube.
  Title: Rangitoto Island
  Passage: Rangitoto Island is a volcanic island in the Hauraki Gulf near Auckland, New Zealand.  The 5.5 km wide island is an iconic and widely visible landmark of Auckland with its distinctive symmetrical shield volcano cone rising 260 metres (850 ft) high over the Hauraki Gulf.  Rangitoto is the most recent and the largest (2311 hectares) of the approximately 50 volcanoes of the Auckland volcanic field.  It is separated from the mainland of Auckland's North Shore by the Rangitoto Channel.  Since World War II it has been linked by a causeway to the much older, non-volcanic Motutapu Island.
  Title: Motutapu Island
  Passage: Motutapu Island (or simply "Motutapu") is a 1509 ha island in the Hauraki Gulf to the northeast of the city of Auckland, New Zealand.  The island is part of the Hauraki Gulf Maritime Park.
  Title: Killer whale
  Passage: The killer whale or orca ("Orcinus orca") is a toothed whale belonging to the oceanic dolphin family, of which it is the largest member.  Killer whales have a diverse diet, although individual populations often specialize in particular types of prey.  Some feed exclusively on fish, while others hunt marine mammals such as seals and dolphins.  They have been known to attack baleen whale calves, and even adult whales.  Killer whales are apex predators, as there is no animal that preys on them.  Killer whales are considered a cosmopolitan species, and can be found in each of the world's oceans in a variety of marine environments, from Arctic and Antarctic regions to tropical seas.
citations: Whale watching in New Zealand Killer whale