Chelmon muelleri also commonly referred as the Blackfin coralfish, Muelleri Butterfly or Mьller's Coralfish is found exclusively on coastal reefs and estuaries of Queensland/Australia. Recently recorded from northwestern Australia.
Chelmon muelleri is closely related to the Copperband Butterfly, the Muelleri Butterfly fares notably better in captivity than its shorter-snouted relative. Mьller's Coralfish is highly sought after by collectors of rare butterflies, though not often available,
Most individuals can be kept in a reef tank with most soft corals and small-polyped stony corals - although some individuals may nip at large-polyped stony corals, certain soft corals and zoanthids. One advantage in keeping a Chelmon muelleri in a reef tank is that most will eat Aiptasia; however, some individuals will ignore them. One possible drawback to housing this fish in a reef tank is that it will decimate polychaete worm populations.
Remarks:
Butterflyfish are not recommended for reefs as they will pick at or eat a wide variety of corals, fan worms, and other invertebrates. Most Butterflyfish are known to pick at Aiptaisia, a parasitic anemone.
