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Acanthurus olivaceus, the orange-band surgeonfish, the orange-shoulder surgeonfish or the orangebar tang,is a species of marine ray-finned fish belonging to the family Acanthuridae, this family includes the surgeonfishes, unicornfishes and tangs. It lives in the tropical waters of the Indo-west Pacific. Taxonomy Acanthurus olivaceus was first formally described in 1801 by the German naturalists Marcus Elieser Bloch and Johann Gottlob Theaenus Schneider with its type locality given as Tahiti in the Society Islands,This species is closely related to the range restricted Marquesas surgeonfish (A. reversus), and together these taxa form a species complex within the genus Acanthurus.The genus Acanthurus is one of two genera in the tribe Acanthurini which is one of three tribes in the subfamily Acanthurinae which is one of two subfamilies in the family Acanthuridae. Description The orange band surgeonfish is a deep-bodied, laterally-compressed oval fish, rather over twice as long as it is deep, with a maximum length of 35 cm (14 in), although a more typical length is 25 cm (10 in). Both dorsal and anal fins are long and low, extending as far as the caudal peduncle. The dorsal fin has nine spines and 23 to 25 soft rays while the anal fin has three spines and 22 to 24 soft rays. The tail fin is crescent-shaped, the points growing longer as the fish gets older. The adult fish is greyish-brown; a sharp vertical line usually separates the paler front half of the fish from the darker hind portion. There is a distinctive orange bar, surrounded by a purplish-black margin, immediately behind the top of the gill cover, and blue and orange lines at the bases of the fins. Like all surgeonfish, this species has a pair of scalpel-like scales that project upward from the caudal peduncle. Larger males develop a convex snout which clearly differentiates them from females. Juvenile fish are yellow. Distribution and habitat This fish is found in the tropical eastern Indian Ocean and the western Pacific Ocean. Its range extends from Christmas Island and the Cocos Keeling Islands to southern Japan, Western, Northern and Eastern Australia, Indonesia, the Philippines and Hawaii. It is associated with reefs, often on outer slopes and in more exposed locations. As an adult, it is a solitary fish or sometimes joins schools, with a depth range of between about 9 and 46 m (30 and 150 ft), but juveniles are found in shallower water in sheltered locations in small groups. Ecology The orange band surgeonfish feeds on detritus and on algae growing on the seabed, as well as the film of diatoms and filamentous algae that grows on sand and other substrates.[2] It often forms schools with parrotfish, tangs and other species of surgeonfish, which all have similar diets; their grazing is important in maintaining biodiversity by keeping rocks free from excessive growth of algae so that coral larvae can find suitable habitat to settle. The fish can change colour from dark to pale almost instantaneously. Status The orange band surgeonfish has a wide distribution in the tropical Indo-Pacific region and is moderately common. It is sometimes found in fish markets and in the aquarium trade but is not a species targeted by fisheries. No particular threats have been recognised, so the International Union for Conservation of Nature has listed its conservation status as being of least concern.

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Valenciennea puellaris, commonly known as the Orange-spotted sleeper-goby, is a small, slender species of goby found in the Indian Ocean and western Pacific Ocean. They are characterized by their pale grey to brownish-grey body with a blue-edged orange stripe along the lower sides, orange dashes along the upper sides, and pale blue dashes on the head.  Key features of Valenciennea puellaris include: Body Shape: Slender and elongated with a rounded caudal fin.  Coloration: Pale grey or brownish-grey with distinct orange markings. Pacific fish have a pale grey body with orange spots, while Indian Ocean fish have a pale blue-grey body with an orange stripe across the lower head and orange bars on the sides.  Scales: Ctenoid body scales that become cycloid anteriorly before the first dorsal fin.  Head: Lack scales on the head or midline of the nape, with scales extending forward on the side of the nape.  Fins: The third dorsal spine is the longest and filamentous in juveniles.  Habitat: Inhabit lagoons and outer reefs, with sandy substrates and rubble for burrows.  Behavior: Usually found in monogamous pairs, seeking refuge in shallow burrows.  Diet: Sift through sand for invertebrates, but may also consume small frozen foods.  Breeding: Spawning occurs in small caves or burrows, with the female guarding the eggs. 

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The Spotted Mandarin Dragonet, Synchiropus picturatus, is a popular aquarium fish known for its vibrant colors and peaceful nature. It's best kept as a pair, with a single male and female, though they can also live alone or in small, loose groups. They are often solitary, spending much of their time near the substrate or rocks in their natural habitat.  Key aspects of keeping a Synchiropus picturatus pair: Pairing: A male and female pair is ideal, as they can live peacefully together.  Size: They can grow up to 8cm in length.  Tank Size: A minimum of 100 liters is recommended for a single specimen, with larger tanks needed for pairs or groups.  Diet: They are carnivorous and primarily feed on live microfauna like amphipods and copepods, which need to be present in sufficient numbers in the tank.  Tank Mates: Peaceful fish, seahorses, pipefish, and other small fish are good tank mates. They are not compatible with highly aggressive or competitive fish.  Aquarium Setup: They require a well-established aquarium with plenty of live rock for grazing and hiding, and a sandy bottom. Temperament: They are generally peaceful and do not harm corals or invertebrates. The picturesque dragonet (Synchiropus picturatus) is a brightly colored member of the dragonet family native to the Indo-West Pacific: Philippines, eastern Indonesia and northwest Australia. It occasionally makes its way into the aquarium trade, where it is commonly known as the spotted mandarin, psychedelic mandarin or target mandarin. Description The picturesque dragonet may grow to a size of 7 cm in length. They have thick slime on their skin that inhibits many types of parasitic infection and minimizes the risk of disease following stress or physical trauma. This seems to help protect them from some other more aggressive fish. Synchiropus picturatus is one of only two vertebrates known to have blue colouring because of cellular pigment, the other being the closely related Synchiropus splendidus. The name "cyanophore" was proposed for the blue chromatophores, or pigment-containing and light-reflecting cells. In all other known cases, the colour blue comes from thin-film interference from piles of flat, thin and reflecting purine crystals. This species is quite harmless to humans and is quite peaceful with other species. The Picturesque dragonet is a marine animal that naturally lives at a temperature between 24-28 C.

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Synchiropus splendidus, the mandarinfish or mandarin dragonet, is a small, brightly colored member of the dragonet family, which is popular in the saltwater aquarium trade. The mandarinfish is native to the Pacific, ranging approximately from the Ryukyu Islands south to Australia. It can usually be found in some of the warmer waters. Taxonomy and etymology The mandarinfish was first described as Callionymus splendidus in 1927 by Albert William Herre, an American ichthyologist working in the Philippines.It was later placed in genus Synchiropus. The generic name Synchiropus is from Ancient Greek syn-, meaning "together", and -chiropus meaning "hand-foot". The specific epithet splendidus is from the Latin for 'bright' or 'glittering.'The common name of the mandarinfish comes from its extremely vivid colouration, evoking the robes of an Imperial Chinese mandarin.Other common names include mandarin goby, green mandarin, striped mandarinfish, striped dragonet, green dragonet and sometimes psychedelic mandarinfish.The similarly named mandarin fish (Siniperca chuatsi), properly known as the Chinese perch, is distantly related. The mandarinfish belongs to the perciform family Callionymidae, the dragonets, which counts 10 genera and more than 182 species. Genus Synchiropus counts 51 species, divided into 10 subgenera. The mandarinfish is in subgenus Synchiropus (Pterosynchiropus) along with the S. occidentalis and S. picturatus. Description S. splendidus is one of only two vertebrate species known to have blue colouring because of cellular pigment, the other being the closely related psychedelic mandarin (S. picturatus). The name "cyanophore" was proposed for the blue chromatophores, or pigment-containing and light-reflecting cells. In all other known cases, the colour blue is structural, as it comes from thin-film interference from piles of flat, thin and reflecting purine crystals. The mandarinfish has a body shape similar to a goby, though this is the only resemblance between the two. The vivid coloration sports a bright blue background, with swirly orange stripes and a blue-greenish face with bold blue stripes. The large pelvic fins are used for 'walking' on the seafloor and are often mistakenly seen as the pectoral fins. The real pectorals are located almost at the center and are nearly transparent, with a tinge of fin, the anal fins and on part of the tail, the rest of which is striped in vibrant orange and blue. The dorsal fin, which is exceptionally tall in males, has a striking orange-and blue design as well. The eyes are usually red with black pupils. Different varieties sport different markings and colors. The green mandarin is the fish that has been described. The red mandarin is the same species, but its pelvic fins and what would be orange is red. In some rare cases, the entire dragonet is red with black stripes. The spotted mandarin is light gray-green with black, pink and blue spots. Mandarinfish are reef dwellers, preferring sheltered lagoons and inshore reefs. While they are slow-moving and fairly common within their range, they are not easily seen due to their bottom-feeding habit and their small size (reaching only about 6 cm). They feed primarily on small crustaceans and other invertebrates. Diet Based on the gut analyses of seven wild fish Sadovy et al. (2001) determined that the mandarinfish has a mixed diet that consists of harpacticoid copepods, polychaete worms, small gastropods, gammaridean amphipods, fish eggs and ostracods. In the wild, feeding is continuous during daytime; the fish peck selectively at small prey trapped on coral substrate in a home range of many square meters. Relationship to humans Despite their popularity in the aquarium trade, mandarinfish are considered difficult to keep, as their feeding habits are very specific. Some fish never adapt to aquarium life, refusing to eat anything but live amphipods and copepods (as in the wild); though individuals that do acclimatize to aquarium food are considered to be quite hardy and highly resistant to diseases, such as marine ich. They are less likely to contract marine ich because they do not have the typical skin type that is affected by this disease. Mandarinfish also have a layer of debatably smelly and bitter slime instead of scales, which blocks out disease and probably also discourages predators, implying their bright coloration is aposematic. The mandarinfish appeared on a 39-kip postage stamp from Laos issued in 1987, and a 40-cent postage stamp of the Federated States of Micronesia issued on 26 August 1993.

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The red-eye wrasse (Cirrhilabrus solorensis) is a species of wrasse native to Indonesia and Australia, where found near the Lesser Sundas, Maluka and Darwin. It inhabits coral reefs on coastal and outer reef lagoons at depths of 5 to 35 m (16 to 115 ft). Adult male C. solorensis have a yellowish-dusky or yellow-green snout to crown, blue operculum, purple neck-region, yellow-orange upper body and blue belly. It can reach a total length of 11 cm (4.3 in).Until 2021, it was commonly confused with C. aquamarinus and C. chaliasi, which occur in similar habitats and all have mostly reddish eyes. In C. aquamarinus, which is found near Sulawesi, the adult male has a mostly deep yellow head, a dark blue back and operculum, and much of the body is blue-green. In C. chaliasi, which is found near the Lesser Sundas and Tukangbesi Islands, the adult male has a pinkish-red head, yellow-orange upper body and blue belly.Females of these species are considerably duller and not as easily separated. C. solorensis occurs in small harems of one male, several females and juveniles. It is regarded as data deficient by the IUCN. It can be found in the aquarium trade.

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The foxface rabbitfish (Siganus vulpinus), also known as the foxface, black-face rabbit fish, badger fish or the common foxface is a species of marine ray-finned fish, a rabbitfish belonging to the family Siganidae. It is found in the Indian and Pacific Oceans. It can be found in the aquarium trade. Taxonomy The foxface rabbitfish was first formally described as Amphacanthus vulpinus in 1845 by the German zoologists Hermann Schlegel & Salomon Müller with the type locality given as Ternate Island one of the Molucca Islands in Indonesia.The blotched foxface (S. unimaculatus) differs from S. vulpinus in possessing a large black spot below the soft-rayed part of the dorsal fin. It is sympatric and not phylogenetically distinct, and though these two might be recently evolved species, they may be just colour morphs and should arguably to be united under the scientific name S. vulpinus. under the scientific name S. vulpinus.The specific name vulpinus means "fox-like", Schlegel and Müller did not explain what this alluded to but it is thought to be the pointed snout. Description The foxface rabbitfish has a compressed body which has a depth which fits into its standard length 1.9 to 2.4 times. The dorsal profile of the head is steep to the rear of the eye and there is an indentation between the eyes and a tubular snout. The caudal fin is weakly forked. There is a procumbent spine in the nape to the front of the dorsal fin.Like all rabbitfishes, the dorsal fin has 13 spines and 10 soft rays while the anal fin has 7 spines and 9 soft rays. The fin spines hold venom glands. This species attains a maximum total length of 25 cm (9.8 in), although 20 cm (7.9 in) is more typical.The main colour on this rabbitfish is vivid yellow with white on the head and front part of the body, however foxfaces can camouflage when experiencing threat, quickly changing colour to a dark brown. There is a black band running backwards from the mouth through the eye to the start of the dorsal fin and there is a black area on the breast that runs upwards to just above the base of the pectoral-fin, tapering as it does so. Distribution and habitat The foxface rabbitfish occurs in the far eastern Indian Ocean and in the western Pacific from Indonesia to the Marshall and Gilbert Islands north as far as Taiwan and south to New Caledonia and Australia.[1] In Australia it is found from Western Australia on the northern reefs and offshore reefs, at Ashmore Reef in the Timor Sea, and on the east coast in Queensland from the northern Great Barrier Reef to the Capricorn Islands. It has been recorded as deep as 30 m (98 ft).[1] This species lives in lagoons and seaward reefs where there is a rich growth of corals. Biology The foxface rabbitfish is omnivorous, eating mostly algae and zooplankton. They may be territorial, adults are normally found as either solitary individuals or in pairs and are associated with branching Acropora corals. Juveniles and subadults may sometimes form large schools, feeding on algae growing on the bases of Acropora corals.This species produces venom in the spines of its fins.In a study of the venom of a congener it was found that rabbitfish venom was similar to the venom of stonefishes. Utilisation The foxface rabbitfish appears in the aquarium trade. No statistics are kept for the catch and in some areas this species appears in mixed catches of reef fish, caught by spearfishing.

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Naso elegans, the elegant unicornfish, the blonde naso tang, Indian orange-spine unicorn, lipstick surgeonfish, lipstick tang, orangespine unicornfish or smoothheaded 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 Indian and western Pacific Oceans. Taxonomy Naso elegans was first formally described as Aspisurus elegans in 1829 by the German zoologist and explorer Eduard Rüppell with its type locality given as the northern Red Sea. This species is classified within the nominate subgenus of the genus Naso.[The genus Naso is the only genus in the subfamily Nasinae in the family Acanthuridae. For a long time this species was regarded as an Indian Ocean colour morph of the orangespine unicornfish (Naso lituratus) until it was shown that there were consistent meristic differences. Etymology The specific epithet elegans is Latin for "choice", "fine" or "select", a reference to the beautiful colours of this fish. Distribution and habitat Naso elegans is found in the Indian and Pacific Oceans. It occurs in the Red Sea south along the east African coast to Durban in South Africa and eastward across the Indian Ocean into the Pacific where it reaches as far east as Bali in Indonesia. It is absent from the waters off the mainland Indian subcontinent.[1] In Australian waters it has been recorded from Christmas Island and the Cocos (Keeling) Islands. The elegant unicornfish occurs in reef flats in coastal and inshore waters in small schools while in more oceanic waters it forms larger schools, Description Naso elegans has 6 spines and between 26 and 30 soft rays, typically 28, supporting the dorsal fin while the anal fin is supported by 2 spines and between 27 and 30 soft rays, typically 29. The pectoral fin contains 16, or more usually, 17 fin rays. There are between 30 and 35 teeth in each jaw and, in adults, these are similar to incisors and have rounded edges. The body has a depth which is equivalent to roughly a quarter of the standard length and it grows more elongate as the fish grows.The keels on the caudal peduncle are larger in males than in females and the males also have longer filaments growing from the caudal fin. The overall colour is grey, with a dark snout separated from the grey head by a yellow bar at the eyes. The dorsal fin is yellow with a thin blue edge and a black band inside that. The anal and pelvic fins are dark brown.The plates on the caudal peduncle are vivid orange separated by a patch of white.The caudal fin is yellowish with a black submarginal band and black lower and upper edges. The elegant unicornfish has a maximum total length of 45 cm (18 in), although 35 cm (14 in) is more typical. Biology Naso elegans is a herbivore, feeding on benthic algae,[8] particularly brown algae in the genera Sargassum and Dictyota.

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Acanthurus triostegus, commonly known as convict tang, manini,convict surgeonfish, convict surgeon, or fiveband surgeonfish, is a species of marine ray-finned fish belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. This species has a wide Indo-Pacific distribution. Taxonomy Acanthurus triostegus was first formally described in 1758 as Chaetodon triostegus by Carl Linnaeus, the description being published in the 10 edition of Systema Naturae with its type locality given as "Indies".The genus Acanthurus is one of two genera in the tribe Acanthurini which is one of three tribes in the subfamily Acanthurinae which is one of two subfamilies in the family Acanthuridae. Etymology Acanthurus triostegus was given the specific name triostegus which means "three covers", this may refer to the three branchiostegal membranes. Description The convict tang is so called because of its bold black stripes on a yellowish background. It is a laterally-compressed oval-shaped fishwith a maximum length of about 26–27 cm (10–11 in). The head is small with a pointed snout and a terminal mouth with thick lips. It has six black stripes which distinguishes it from the zebra tang (Acanthurus polyzona) which has nine, and has a more restricted range in the Indian Ocean. The first black stripe is oblique and passes through the eye. There are two black spots on the caudal peduncle, and on each side there is a sharp, retractable spine, which is used in offence or defence. Distribution and habitat Acanthurus triostegus occurs in the tropical Indo-Pacific region. Its range extends from the East African coast and Madagascar to southwestern Japan, Australia and Central America, including many Pacific island groups. It is found over hard bottoms in lagoons, reef slopes, bays and estuaries. Juveniles are common in tide pools, and larger fish are found at depths down to about 90 m (300 ft). Biology Acanthurus triostegus frequently feed in the vicinity of freshwater discharges, grazing filamentous algae off the rocks.Typically these tangs graze on filamentous algae growing on coral or rocky substrates. The adults aggregate in large schools to feed and these overwhelm damselfishes attempting to defend their territories. The males and females gather in aggegations to spawn. Utilisation Acanthurus triostegus is targeted as a food fish in many parts of its range and in some areas is commercially targeted. In Hawaii it is fished for by recreational anglers and it is also caught for the aquarium trade.

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Ctenochaetus tominiensis, the Tomini surgeonfish, Tomini bristletooth, yellowtip bristletooth or orangetip bristletooth, is a species of marine ray-finned fish belonging to the family Acanthuridae which includes the surgeonfishes, unicornfishes and tangs. This fish is found in the western central Pacific Ocean. Taxonomy Ctenochaetus tominiensis was first formally described in 1955 by the American ichthyologist John Ernest Randall with its type locality given as Sadaa Island in the Gulf of Tomini, Sulawesi, Indonesia.The genera Ctenochaetus and Acanthurus make up the tribe Acanthurini which is one of three tribes in the subfamily Acanthurinae which is one of two subfamilies in the family Acanthuridae. Description Ctenochaetus tominiensis has its dorsal fin supported by 8 spines and 24 or 25 soft rays while the anal fin is supported by 3 spines and 22 or 23 soft rays. The rear ends of the dorsal and anal fins are, uniquely in the genus Ctenochaetus, angular. The lips have warty margins. In juveniles the caudal fin is forked and in adults it is lunate. The maximum published standard length of this fish is 16 cm (6.3 in).The overall colour of the body is yellowish brown with a white caudal fin and broad yellow margins to the dorsal and anal fins. Distribution and habitat Ctenochaetus tominiensis is found in the western central Pacific Ocean from Malaysia and Indonesia east through East Timor, the Philippines, Palau, Micronesia, Papua New Guinea, the Solomon Islands, Tuvalu, Vanuatu and Fiji, south to the Great Barrier Reef. It has been recorded from Tonga.This species is found solitarily or in small aggregations on steep drop offs with dense coral growth in inshorse, sheltered waters at depths between 0 and 45 m (0 and 148 ft).

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