Cirrhilabrus aquamarinus is a compact fairy wrasse from eastern Indonesia that spent years in the aquarium trade under the name Cirrhilabrus solorensis before being formally separated in 2021. Terminal males are unmistakable: a bright yellow head washes into orange across the nape, a red iris sits above an intense blue-to-indigo opercular patch that forms the diagnostic chin-strap, and the upper body glows iridescent aquamarine to teal over a cream underside. Females are considerably more restrained, showing an orange-pink head, a greenish snout and nape, and an olive-green body that fades toward pink with a small dark mark near the caudal peduncle. Adults reach roughly 4 inches.

The species is concentrated around eastern Sulawesi, the Banggai Islands and Wakatobi, with occasional reports from Banda Neira, where it patrols shallow exposed rubble between about 5 and 20 meters. A 75-gallon aquarium is the practical minimum for a single adult, and larger footprints are preferable if a harem is planned. Build the layout around long, unobstructed swimming lanes backed by rockwork with caves and crevices, since this wrasse cruises open midwater for much of the day but retreats to cover when settling in or as the lights dim. Established, well-filtered systems with moderate to strong flow suit it best, with calmer pockets among the rocks. A tightly fitted lid or fine jump guard is not optional; startled individuals leave the water readily.