Anthias are very abundant in terms of number of individuals and often form huge mid-water feeding aggregations, especially adjacent to steep outer-reef dropoffs. They are among the reef's most colourful inhabitants, usually exhibiting dazzling hues of yellow, red, purple, magenta, and pink. Generally males are more colourful and typically outnumbered by females. Each male dominates a group of females and enforces a pecking-order hierarchy. In the event the male is gone, the most dominant female will turn male and assumes the dominant male's role in the harem. This is very interesting to observer in captivity if the aquarium is large enough. However if confined to a small space the weaker individuals can get harassed into hiding, refusing to eat and wasting away.