[1] It is a site attached fish that lives in corals, usually Stylophora pistillata and species of Acropora.

In these corals it hides at a moment of danger[2] and sleeps at night.

[3] It feeds on zooplankton that drifts with the current,[4] and grows to a size of 6 cm in length.

[1] Dascyllus marginatus lives in groups of 2-25 individuals,[5] and while foraging for food around their home coral, group members keep separated and stable foraging spaces.

[6] It occasionally makes its way into the aquarium trade.