The Allen’s Damsel (P. alleni) is metallic blue with an iridescent sheen. The dorsal region may be slightly darker. The anal fin is yellow and the bottom of the base of the tail fin is black. Males are usually more vibrantly colored than females but both are very similar. This fish has many other common names including Electric Blue Damsel, Yellow Belly Damsel, or just the Neon Damsel.
Care Level: Easy
Color Form: Blue, Green, Orange
Water Conditions: 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.020-1.025
Max. Size: 2½”
Minimum Tank Size: 30 gallons