Question: Besides dolphins and killer whales, what other animals can be seen in Hauraki Gulf Marine Park?

Context paragraphs:
Whale watching in New Zealand: 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.

Cape Byron Marine Park: Cape Byron Marine Park is one of four Marine Parks in New South Wales, Australia, and is the most recently sanctioned.  The Cape Byron Marine Park is located in Northern NSW and extends 37 km from the Brunswick River to Lennox Head.  The Marine Park extends out to 3 nmi which dictates the border between state and federal jurisdiction.  The marine park covers the area of 220 km2 and includes a variety of marine terrain including beaches, rocky shores, open ocean and the tidal waters of the Brunswick River and its tributaries, the Belongil creek and Tallow Creek.  The Cape Byron Marine Park was declared in 2002 and the zoning plan was implemented in April 2006.  Of the 15 distinct marine ecosystems identified within the Tweed-Moreton bioregion, the Cape Byron Marine Park supports 10 of these.

Lord Howe Island Marine Park: Lord Howe Island Marine Park is the site of Australia's and the world’s most southern coral reef ecosystem.  The island is 10 km in length, 2 km wide and consists of a large lagoonal reef system along its leeward side, with 28 small islets along its coast.  In 1999, the waters within three nautical miles of Lord Howe Island (465.45 km) were declared a marine park under the "NSW Marine Park Act" 1997 to protect its unique marine biodiversity, with the park currently being managed by the New South Wales Marine Parks Authority.  Both Lord Howe Island and Balls Pyramid are incorporated within the three nautical miles protected by the state marine park.  The waters from 3 - 12 nautical miles were declared a federal marine park on 21 June 2000, see Lord Howe Island Marine Park (Commonwealth waters).  Both marine parks complement the island's status as a World Heritage Site.

Dwarf killer whale: The familiar killer whale ("Orcinus orca") is a cosmopolitan species, found in all oceans of the world.  Despite being the most widespread mammal in the world, only one species is currently recognized.  Oceanic Science journals have long hinted at the existence of a complex breed of miniature killer whales since the 1950's.  The dwarf killer whale is a type of killer whale found in Antarctic waters believed by some scientists to be a distinct species from the larger killer whales found throughout the world's oceans.  Since Soviet researchers proposed new species in the 1980's, the differences in killer whales have been studied more closely in order to gain more credible knowledge on possible subspecies of the killer whale.  There are several ecotypes that have been established in regards to the whales physical appearances and body length by Pitman and colleagues.  A recent study proposed by Pitman et al. (2007) used aerial photogrammetry to determine the size of numerous Type C killer whales, supporting early Soviet research which suggested that one or possibly two distinct species of killer whale exist in the Southern Ocean.  Therefore, scientific evidence is starting to make the connection between ecotype C and the dwarf killer whale.

Killer whale: 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.

Killer whales of Eden, Australia: The killer whales of Eden, Australia were a group of killer whales ("Orcinus orca") known for their co-operation with human hunters of cetacean species.  They were seen near the port of Eden in southeastern Australia between 1840 and 1930.  A pod of killer whales, which included amongst its members a distinctive male called Old Tom, would assist whalers in hunting baleen whales.  The killer whales would find target whales, shepherd them into Twofold Bay, and then alert the whalers to their presence and often help to kill the whales.

Hauraki Gulf: The Hauraki Gulf / Tīkapa Moana is a coastal feature of the North Island of New Zealand.  It has an area of 4000 km², and lies between, in anticlockwise order, the Auckland Region, the Hauraki Plains, the Coromandel Peninsula, and Great Barrier Island.  Most of the gulf is part of the Hauraki Gulf Marine Park.

North Head, New Zealand: Maungauika is a volcano forming a headland called North Head at the east end of the Waitemata Harbour in Auckland, New Zealand in the suburb of Devonport.  Known for its sweeping views over the harbour and the Hauraki Gulf, since 1885 the head was mainly used by the military as a coastal defence installation, which left a network of accessible old bunkers and tunnels as its legacy, forming part of the attraction.  The site was protected as part of Hauraki Gulf Maritime Park in 1972 and listed as a Category I historic place in 2001.  As part of a 2014 Treaty of Waitangi claim settlement the volcanic cone was officially named Maungauika and the reserve renamed Maungauika / North Head Historic Reserve.  Maungauika is the Māori word for" Mountain of Uika".

Michael Bigg: Dr. Michael A. Bigg (1939–1990) was a Canadian marine biologist who is recognized as the founder of modern research on killer whales.  With his colleagues, he developed new techniques for studying killer whales and conducted the first population census of the animals.  Bigg's work in wildlife photo-identification enabled the longitudinal study of individual killer whales, their travel patterns, and their social relationships in the wild, and revolutionized the study of cetaceans.

Coromandel Peninsula: The Coromandel Peninsula on the North Island of New Zealand extends 85 kilometres north from the western end of the Bay of Plenty, forming a natural barrier to protect the Hauraki Gulf and the Firth of Thames in the west from the Pacific Ocean to the east.  It is 40 kilometres wide at its broadest point.  Almost the entire population lies on the narrow coastal strips fronting the Hauraki Gulf and the Bay of Plenty.  In fine weather the peninsula is clearly visible from Auckland, the country's biggest city, which lies on the far shore of the Hauraki Gulf, 55 kilometres to the west.  The peninsula is part of the local government areas of Thames-Coromandel District and the Waikato Region.

Supporting paragraphs: Whale watching in New Zealand Killer whale
Answer: Bryde's Whales