Achilles Tang (Eating Pellets)

Snapshot: Also known as the Red-tailed Surgeonfish. A sleek beauty boasting a very dark brown to almost purplish body. A distinctive white marking graces its gill covers, while a captivating orange teardrop near the caudal fin adds an extra touch of brilliance.
 
Other tidbits: Can grow up to 21cm or so. Found in various temperate, as well as tropical parts of the Western Pacific Ocean including around Hawaii and the Mariana Islands. Its hues shift with its mood and surroundings, from sleek black to radiant brown, with pops of orange and yellow.
 
Bare bones must know: Live-rock fish-only system, or reef aquarium with care. Strong water flow to replicate natural habitat (surge zones). Expert aquarists only.