Orange Shoulder Tang

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 The Orange Shoulder Tang (Acanthurus olivaceus), also known as the Orangeband Surgeonfish, is a striking marine fish commonly found in the Indo-Pacific region. It has an elongated, laterally compressed body with a unique colour pattern that changes as the fish matures.

Juvenile Appearance:

• Colour: Juveniles are typically bright yellow all over.
• Size: They start small, around 2-3 inches (5-8 cm).
• Markings: Juveniles do not have adults' distinctive orange shoulder bands.

Adult Appearance:

• Color: Adults transition to a more muted coloration. Their bodies become grayish-blue or olive-green.
• Distinctive Markings: The most notable feature is the orange or reddish band or "shoulder" that extends vertically just behind the gill cover. A blue band typically outlines this orange stripe.
• Size: Adults can grow up to 14-15 inches (35-38 cm) in length.
• Tail: The tail is crescent-shaped and often darker than the body.

Behavior:

• Diet: Orange Shoulder Tangs are herbivorous, feeding mainly on algae in the wild. In aquariums, they can be fed various algae-based foods, along with some meaty foods as supplements.
• Temperament: They are generally peaceful but can be territorial, especially as they grow. They do well in larger tanks where they have plenty of swimming space.
• Habitat: They are found in coral reefs, often swimming in small groups or solitary. They are active swimmers and prefer tanks with strong water flow.