阿氏刺尻鱼，俗名紫火球、袖珍神仙，为辐鳍鱼纲鲈形目鲈亚目盖刺鱼科的其中一个种。

本鱼分布于西大西洋区，包括美国南部、墨西哥、加勒比海各岛屿、哥伦比亚、委内瑞拉、洪都拉斯、巴拿马、尼加拉瓜等海域。

The cherubfish, or pygmy angelfish (Centropyge argi) is a gentle omnivorous marine angelfish, with a metallic blue body and yellow to orange colouration in parts of the head only. It is native to the Caribbean and Gulf of Mexico, North to North Carolina. It has a maximum length of 8 cm. It is easily confused with the orangeback angelfish (Centropyge acanthops), but in the latter the orange stripe extends across the back.