Acanthurus Olivaceus – Care | Fishbase | Juvenile | Facts

Acanthurus Olivaceus

Acanthurus olivaceus, also called the orange-band surgeonfish, the orange-shoulder surgeonfish, or the orange bar tang, is a member of the family Acanthuridae, the surgeonfishes. It lives within the tropical waters of the Indo-west Pacific. In this article, I am going to talk about Acanthurus Olivaceus juvenile, fishbase, care, etc.

Oval-shaped body with a rounded head. The pale gray entrance half of body, darkish rear half, broad black-edged orange streak behind the attention, black tail backbone, and lunate tail.

Juveniles yellow, with a faint hint of an orange streak behind the attention. Similar to different yellow juvenile surgeons and greatest distinguished by the presence of adults.

Acanthurus Olivaceus Description

The orange band surgeonfish is a deep-bodied, laterally-compressed oval fish, fairly over twice as long as it’s deep, with the most size of 35 cm (14 in), though a more typical size is 25 cm (10 in).

Dorsal spines (whole): 9; Dorsal delicate rays (whole): 23-25; Anal spines: 3; Anal delicate rays: 22 – 24. Body of grownup darkish grayish brown; juveniles yellow; posterior to the higher finish of gill opening is a vivid orange horizontal band, with purplish-black border.

The Head and anterior half of the body normally abruptly paler than the posterior half. Anterior gill rakers 24-28; posterior 23-27. Large grownup males (about 17 cm) with more particular convexity of snout profile.

Both dorsal and anal fins are long and low, extending so far as the caudal peduncle. The dorsal fin has 9 spines and 23 to 25 delicate rays whereas the anal fin has three spines and 22 to 24 delicate rays.

The tail fin is crescent-shaped, the factors rising longer because the fish will get older. The grownup fish is greyish-brown; a pointy vertical line normally separates the paler entrance half of the fish from the darker hind portion.

There is a particular orange bar, surrounded by a purplish-black margin, instantly behind the top of the gill cowl, and blue and orange strains on the bases of the fins.

Like all surgeonfish, this species has a pair of scalpel-like scales that challenge upward from the caudal peduncle. Larger males develop a convex snout which clearly differentiates them from females. Juvenile fish are yellow.

Acanthurus Olivaceus Distribution and habitat

This fish is found within the tropical eastern Indian Ocean and the western Pacific Ocean. Its vary extends from Christmas Island and the Cocos Keeling Islands to southern Japan, Western, Northern, and Eastern Australia, Indonesia, the Philippines, and Hawaii.

It is related to reefs, typically on outer slopes and in more uncovered areas. As a grownup, it’s a solitary fish or generally joins colleges, with a depth vary of between about 9 and 46 m (30 and 150 ft), however, juveniles are present in shallower water in sheltered areas in small teams.

Acanthurus Olivaceus

Acanthurus Olivaceus Ecology

The orange band surgeonfish feeds on detritus and on algae rising on the seabed, in addition to the movie of diatoms and filamentous algae that grows on sand and different substrates.

It typically kinds colleges with parrotfish, tangs, and different species of surgeonfish, which all have related diets; their grazing is vital in sustaining biodiversity by protecting rocks free from extreme progress of algae in order that coral larvae can discover appropriate habitat to settle. The fish can change color from darkish to pale virtually instantaneously.

The Orangeshoulder Tang is also called the Orange-epaulette Surgeonfish, Orangespot Surgeonfish, Orange band Surgeonfish, and Orangeshoulder Surgeonfish. As a juvenile, it’s strong yellow, with simply the slightest trace of blue fringing on the anal and dorsal fins.

As an adult, the entrance half of the body turns light grey and the back half takes on a darkish gray-blue color. Above the pectoral fins is an attention-grabbing orange stripe that’s outlined by the darkish grey color. The tail takes on a lyre form.

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Acanthurus Olivaceus Care

A 180 gallon or bigger aquarium is important to offer loads of swimming room. It shouldn’t be aggressive in direction of different Tangs. If housing more than one, it’s best so as to add a juvenile to the aquarium that accommodates an adult.

A gray to brown surgeonfish with a vivid orange blue-edged band behind the attention, and a white margin on the center caudal-fin rays. The head and anterior half of the body could also be abruptly paler than the posterior half. The vivid yellow juveniles have a pale blue margin on the anal fin, and the band behind the attention regularly develops with progress.

Although Tangs will eat meaty meals together with the opposite fish within the aquarium, it’s important that they’re provided loads of marine-based seaweed and algae. This will strengthen their immune system, cut back aggression, and enhance their total well being.

Offer dried seaweed tied to a rock or use a veggie clip, and feed at least 3 instances per week. Sea Veggies, Seaweed Salad, and Ocean Nutrition are all ultimate merchandise and are very simple to make use of.

Size / Weight / Age

Max size : cm TL male/unsexed.


Inhabit seaward reefs, in areas of naked rock or combined rubble and sand, from 9 to at the least 46 m depth; juveniles inhabit protected bays and lagoons, singly or in small teams in as little as Three m.

Benthopelagic. Adults happen singly or in colleges and feed on the surface film of detritus, diatoms, and advantageous filamentous algae overlaying sand and naked rock. Rarely toxic. Learn more about alligator gar attack.

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