Mimic Lemonpeel Tang (Acanthurus pyroferus): Breeding Guide
Acanthurus pyroferus is famous for juveniles mimicking Centropyge angelfish, but reproduction follows the genus: open-water broadcast spawning and pelagic larvae that cannot be reared at home.
Overview
The Mimic Lemonpeel Tang, Acanthurus pyroferus, ranges through the Indo-Pacific from the Seychelles to the Marquesas and Tuamotu islands, north to southern Japan and south to the Great Barrier Reef and New Caledonia. FishBase gives a maximum total length of 29 cm and a depth range of 0 to 60 m, typically 5 to 40 m. A striking feature is juvenile mimicry: per FishBase, juveniles mimic Centropyge angelfishes, resembling C. flavissimus in Guam but C. vrolikii in Palau where that angelfish is absent.
Adults lose the bright juvenile coloration and become dusky. No record exists of this tang being bred in captivity.
Spawning Behavior & Trigger
FishBase does not provide species-specific spawning details for A. pyroferus. As an Acanthurus surgeonfish it is a pelagic broadcast spawner: the genus generally spawns at dusk in short pair- or group-spawning ascents near the seaward reef edge, with spawning often tied to warming water and lunar phases so that currents disperse the eggs.
Spawning is a brief open-water gamete release with external fertilization and no nest. The juvenile angelfish mimicry is an antipredator adaptation and is unrelated to a manageable breeding behavior.
Egg & Fry Care
Eggs are pelagic and buoyant, hatching into transparent acronurus larvae that drift in open water. As in other surgeonfishes, this planktonic phase can last more than 39 days before the larva settles and metamorphoses.
Because the larvae depend on an extended ocean drift and natural plankton, they cannot be reared in a closed aquarium. Surgeonfish larviculture has only been attempted in research aquaculture.
Common Challenges
- Gametes are released into open water, so there is no clutch or nest to protect.
- The juvenile Centropyge mimicry offers no benefit to a breeder and does not simplify pairing.
- Pelagic acronurus larvae need weeks of ocean plankton drift that tanks cannot provide.