The Hawaiian archipelago is in the central North Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of Australia. Politically, the islands are part of the U.S. state of Hawaii. The state encompasses nearly the entire volcanic Hawaiian Island chain, comprising hundreds of islands spread over 1,500 miles (2,400 km).
At the southeastern end of the archipelago, the eight "main islands" are (from the northwest to southeast) Niʻihau, Kauaʻi, Oʻahu, Molokaʻi, Lānaʻi, Kahoʻolawe, Maui, and Hawaiʻi. 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). [1]
The Hawaiian Islands comprise 137 islands and atolls, with a land area of 6,423.4 square miles (16,636.5 km2). [2] This archipelago and its oceans are physiographically and ethnologically part of the Polynesian subregion of Oceania.
The climate of Hawaii is typical for a tropical area, although temperatures and humidity tend to be a bit less extreme than other tropical locales due to the constant trade winds blowing from the east.
The surrounding waters are affected by effluents generated and released from the islands themselves. Floating plastic garbage is a problem, and refuse from the Great Pacific Garbage Patch affects its beaches. Other pressures on Hawaii's fish population are its fishing industries and whaling [3] until IWC's moratorium in 1986. [4] In the last century, some commercially fished stocks have decreased by 80–85%. [5]
Due to its isolation, very few native freshwater fish species are found in Hawaii, and none are entirely restricted to freshwater (all are either anadromous, or also found in brackish and marine water in their adult stage).
The seven native fish species regularly seen in fresh water are the flagtail ( Kuhlia xenura ), the mullet ( Mugil cephalus ), the gobies ( Awaous stamineus , Lentipes concolor , Sicyopterus stimpsoni and Stenogobius hawaiiensis ), and the sleeper goby ( Eleotris sandwicensis ). [6] [7] Three of the gobies, A. stamineus, L. concolor and S. stimpsoni, are famous for their ability to climb waterfalls to reach higher sections of freshwater streams. [7] Several other species have been introduced to the freshwater habitats of Hawaii and some of these are invasive. [8]
The Atlantic blue marlin is a species of marlin endemic to the Atlantic Ocean. It is closely related to, and usually considered conspecific with, the Indo-Pacific blue marlin, then simply called blue marlin. Some authorities consider both species distinct.
The skilfish is a species of ray-finned fish, one of two species belonging to the family Anoplopomatidae and the only species in the genus Erilepis. It is also known as black cod, though they have no relation to cod, family Gadidae, and sable fish or sablefish, which is a name commonly used for other species in the family Anoplopomatidae. Found on deep rocky bottoms in the North Pacific at depths of up to 440 metres, they can reach up to 1.83 metres in length and weigh up to 91 kilograms. Young fish display striking white blotches on their body, however their colour changes to dark grey with maturity, and the bright markings become duller and less visible as they grow, similar to the Tiger shark's stripes.
The dogtooth tuna, also known as white tuna, is a species of pelagic marine fish which belongs to the family Scombridae. Despite the name “tuna”, it is not actually a tuna. Instead, it is a bonito.
Naso vlamingii, the bignose unicornfish, scibbled unicornfish, Vlaming's unicornfish, and zebra unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indo-Pacific.
Awaous stamineus, commonly known as ‘O‘opu nakea, is a species of goby native to the Hawaiian Islands. It has been previously considered a synonym of Awaous guamensis but recent work based upon morphological and genetic differences has recognized Hawaiian populations as being distinct. Consequently, Hawaiian Awaous are now recognized as a valid, distinct species.
Kuhlia marginata, the dark-margined flagtail, spotted flagtail, silver flagtail, orange-finned flagtail, northern jungle perch or mountain bass, is a species of diadromous ray-finned fish, a flagtail from the family Kuhliidae. It is found in eastern Asia and Oceania.
Percoidei is one of 3 suborders of bony fishes in the order Perciformes. Many commercially harvested fish species are considered to be contained in this suborder, including the snappers, groupers, basses, goatfishes and perches.
Kuhlia xenura, the strange-tailed flagtail or Hawaii flagtail, is a species of ray-finned fish, a flagtail from the family Kuhliidae which is endemic to Hawaii, where it occurs in fresh, brackish, and marine waters. It can be found in tide pools, estuaries, and on reefs occurring over sand or rock.
The keeltail needlefish, sometimes called the keeled needlefish, is a tropical fish of the family Belonidae. It was described by the French naturalist Charles Alexandre Lesueur in 1821.
Cephalopholis argus, the peacock hind, roi, bluespotted grouper, and celestial grouper, is a species of marine ray-finned fish, a member of the subfamily Epinephelinae, the groupers, and part of the family Serranidae, which also includes the anthias and sea basses. They come from the Indo-Pacific which is variously a commercial gamefish, an invasive species, and occasionally an aquarium resident. Its species name comes from its resemblance to the "hundred staring eyes" of the monster Argus who had a hundred eyes and was the shepherd of the goddess Hera in Greek mythology.
Kuhlia sandvicensis, the reticulated flagtail, zebra-headed flagtail or Hawaiian flagtail, is a species of ray-finned fish, a flagtail from the family Kuhliidae which is found in the central Pacific Ocean. It is popular as a game fish and can also be found in the aquarium trade.
Kuhlia mugil, the barred flagtail, the fiveband flagtail or the five-bar flagtail, is a species of marine ray-finned fish, a flagtail belonging to the family Kuhliidae. It is found in the Indo-Pacific region.
Oplopomus oplopomus, commonly known as the spinecheek goby, is a species of goby native to the Indo-Pacific region. They can grow to a maximum length of 10 centimetres (3.9 in). They inhabit coral reefs.
Kuhlia rupestris, the rock flagtail, jungle perch, mountain trout, buffalo bream, dusky-finned bulleye, rockmountain bass or spotted flagtail, is a species of ray-finned fish, a flagtail, from the family Kuhliidae. It is a catadromous species which is native to the Indo-Pacific and northern Australia.
Doryrhamphus negrosensis, commonly known as Negros pipefish, flagtail pipefish, Masthead Island pipefish or Queensland flagtail pipefish, is a species of marine fish of the family Syngnathidae. It is found in the Western Pacific Ocean, from Borneo to Vanuatu and the Yaeyama Islands to the Rowley Shoals and the Great Barrier Reef. It lives in mud flats and reefs, both coral and rocky, where it is often associated with sea urchins. It is a rather solitary species which may be found in pairs or small groups. It inhabits depths to 9 metres (30 ft), and can grow to lengths of 6.2 centimetres (2.4 in). Although little is known of its feeding habits, it is expected to feed on harpacticoid copepods, gammarid shrimps, and mysids, similar to other pipefish, it may also act as a cleaner fish like other species in the genus Doryrhamphus. This species is ovoviviparous, with males carrying eggs before giving birth to live young. Males may brood at 4.3 cm. It is a small bluish to bluish-grey pipefish which has a pale stripe along the dorsal side of the head and snout, and a dark fan-like caudal fin which has white margins and an orange base.