Question: The Hawaiian grouper is endemic around which atoll in the North Pacific?

Context paragraphs:
Pacific hurricane: A Pacific hurricane is a mature tropical cyclone that develops within the eastern and central Pacific Ocean to the east of 180°W, north of the equator.  For tropical cyclone warning purposes, the northern Pacific is divided into three regions: the eastern (North America to 140°W), central (140°W to 180°), and western (180° to 100°E), while the southern Pacific is divided into 2 sections, the Australian region (90E to 160°E), the southern Pacific basin between (160°E to 120°W).  Identical phenomena in the western north Pacific are called typhoons.  This separation between the two basins has a practical convenience, however, as tropical cyclones rarely form in the central north Pacific and few cross the dateline.

List of fish of Hawaii: The fish species of Hawaii inhabit the Hawaiian archipelago in the central North Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of Australia.  The islands are part of the State of Hawaii, United States.  The state encompasses nearly the entire volcanic Hawaiian Island chain, which comprises hundreds of islands spread over 1500 mi .  At the southeastern end of the archipelago, the eight "main islands" are (from the northwest to southeast) Niʻ ihau, Kauaʻ i, Oʻ ahu, Molokaʻ i, Lānaʻ i, Kahoʻ olawe, Maui, and Hawaiʻ i.  The Northwestern Hawaiian Islands include many atolls, and reefs. Due to Hawaii's isolation 30% of the fish are endemic (unique to the island chain).

Bokak Atoll: Bokak Atoll (Marshallese: Bokaak or Bok-ak , ) or Taongi Atoll is an uninhabited coral atoll in the Ratak Chain of the Marshall Islands, located in the North Pacific Ocean at .  Due to its relative isolation from the main islands in the group, Bokak has an undisturbed flora and fauna that has been allowed to exist in a pristine condition.

North Pacific Current: The North Pacific Current (sometimes referred to as the North Pacific Drift) is a slow warm water current that flows west-to-east between 30 and 50 degrees north in the Pacific Ocean.  The current forms the southern part of the North Pacific Subpolar Gyre and the northern part of the North Pacific Subtropical Gyre.  The North Pacific Current is formed by the collision of the Kuroshio Current, running northward off the coast of Japan, and the Oyashio Current, which is a cold subarctic current that flows south and circulates counterclockwise along the western North Pacific Ocean.  In the eastern North Pacific off southern British Columbia, it splits into the southward flowing California Current and the northward flowing Alaska Current.

Midway Atoll: Midway Atoll ( ; also called Midway Island and Midway Islands; Hawaiian: "Pihemanu Kauihelani") is a 2.4 sqmi atoll in the North Pacific Ocean at .  As its name suggests, Midway is roughly equidistant between North America and Asia.  Midway Atoll is an unorganized, unincorporated territory of the United States.  Midway continues to be the only island in the Hawaiian archipelago that is not part of the state of Hawaii.  Unlike the other Hawaiian islands, Midway observes Samoa Time (, i.e., eleven hours behind Coordinated Universal Time), which is one hour behind the time in the state of Hawaii.  For statistical purposes, Midway is grouped as one of the United States Minor Outlying Islands.  The Midway Atoll National Wildlife Refuge, encompassing 590991.50 acre of land and water (mostly water) in the surrounding area, is administered by the United States Fish and Wildlife Service (FWS).  The refuge and most of its surrounding area are part of the larger Papahānaumokuākea Marine National Monument.

Hawaiian grouper: The Hawaiian grouper ("Hyporthodus quernus", formerly "Epinephelus quernus") is a species of marine fish in the family Serranidae.  A large inquisitive inhabitant endemic to the Hawaiian Archipelago (most common around Midway and Kure Atoll) and Johnston Island.

Kingman Reef: Kingman Reef is a largely submerged, uninhabited triangular shaped reef, 9.5 nmi east-west and 5 nmi north-south, located in the North Pacific Ocean, roughly halfway between the Hawaiian Islands and American Samoa at .  It is the northernmost of the Northern Line Islands and lies 36 nmi northwest of the next closest island (Palmyra Atoll), and 930 nmi south of Honolulu.

Butaritari: Butaritari is an atoll in the Pacific Ocean island nation of Kiribati.  The atoll is roughly four-sided.  The south and southeast portion of the atoll comprises a nearly continuous islet.  The atoll reef is continuous but almost without islets along the north side.  Bikati and Bikatieta islets occupy a corner of the reef at the extreme northwest tip of the atoll.  Small islets are found on reef sections between channels on the west side.  The lagoon of Butaritari is deep and can accommodate large ships, though the entrance passages are relatively narrow.  It is the most fertile of the Gilbert Islands, with relatively good soils (for an atoll) and high rainfall.  Butaritari atoll has a land area of 13.49 km² and a population of 4,346 as of 2010 .  During World War II, Butaritari was known by US forces as Makin Atoll, and was the site of the Battle of Makin.  Locally, Makin is the name of a separate atoll three kilometers to the northeast of Butaritari.

Kure Atoll: Kure Atoll (呉ヶ島 , Kure-gashima ) ( ; Hawaiian: "Mokupāpapa" ) or Ocean Island is an atoll in the Pacific Ocean 48 nmi beyond Midway Atoll in the Northwestern Hawaiian Islands at .  The only land of significant size is called Green Island and is habitat for hundreds of thousands of seabirds.  A short, unused and unmaintained runway and a portion of one building, both from a former United States Coast Guard LORAN station, are located on the island.  Politically it is part of Hawaii, although separated from the rest of the state by Midway, which is a separate unorganized territory.

North Pacific Anadromous Fish Commission: The North Pacific Anadromous Fish Commission (NPAFC) is an international, inter-governmental organization dedicated to the conservation of anadromous fish stocks in international waters of the North Pacific Ocean and its adjacent seas.  It was established on 11 February 1992 by the Convention for the Conservation of Anadromous Stocks in the North Pacific Ocean and originally consisted of four member nations: Canada, Japan, Russian Federation, and United States of America.  On 27 May 2003, the Republic of Korea acceded to the Convention bringing the current number of Commission members to five.  The primary objective of the Commission is to provide a mechanism for international cooperation promoting the conservation of anadromous stocks in the NPAFC Convention Area of the North Pacific Ocean.

Supporting paragraphs: Hawaiian grouper Midway Atoll
Answer: Midway Atoll