Bloch's Surgeonfish (Acanthurus blochii)
Fish in the family Acanthuridae. Moderate care. Reef Safe with Caution.
Quick facts
Appearance
Bloch's Surgeonfish is a medium to large tang with a predominantly dark gray to charcoal body and distinctive white or pale markings on the head and anterior regions. The fish has the characteristic compressed, laterally flattened body shape typical of Acanthuridae, with a sharp, venomous spine (scalpel-like bone) located on each side of the tail base near the peduncle—a feature that gives surgeonfishes their name.
Diet and feeding
Primarily grazes on benthic and filamentous algae in the wild. In captivity, provide high-quality herbivorous preparations including nori sheets, spirulina flakes, and specially formulated herbivore pellets. Supplement with occasional blanched vegetables (zucchini, spinach). Feed 2–3 times daily.
Difficulty and care for the Bloch's Surgeonfish
Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.
Common health issues
Marine ich, Fin Rot, Swim Bladder Disorder, White Spot Syndrome, Columnaris Disease
Origin and habitat
Indo-Pacific region from the Red Sea and East Africa through the Indian Ocean to the western Pacific, including Indonesia, the Philippines, and northern Australia. Found in coastal reef environments, typically at depths of 5–60 meters.
Log Bloch's Surgeonfish in your reef tank
Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Bloch's Surgeonfish alongside everything else in your reef.
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