Pseudanthias evansi is one of the most sharply marked anthias available to reef aquarists, carrying a violet to purple lower body that meets a brilliant yellow back along an abrupt, almost drawn line. The dorsal fin and deeply forked caudal fin are yellow, an orange stripe runs from the snout toward the pectoral fin, and scattered yellow speckling often appears along the flanks. Males can be identified by heavier body speckling and a thickened papilla on the upper lip. The species ranges across the Indian Ocean from East Africa east to the Cocos-Keeling and Christmas islands and north into the Andaman Sea, where large schools hover above outer reef slopes, drop-offs and outer lagoons. Adults reach roughly 3.5 inches.

Housing should reproduce that open-water habitat. A 75-gallon aquarium is the practical minimum for a single fish, and a group needs considerably more volume, on the order of 125 gallons or larger, with substantial unobstructed swimming room in the upper half of the water column. Build the rockwork so that caves and overhangs provide retreat space without consuming the open area these fish patrol. Strong, well-distributed flow suits the species and carries small foods past the school in a natural manner. A secure cover is essential, since this anthias is a capable jumper, and stable water chemistry matters a great deal to its long-term condition. An attached refugium cultivating copepods and amphipods is a valuable addition, supplying a trickle of live plankton between prepared feedings. This is a demanding fish to establish, best suited to mature systems and experienced keepers.