The 4-Stripe Damselfish, also known as Blacktail Dascyllus, Blacktail Damselfish, or Blacktail Humbug, is a popular fish. Three alternating black and white vertical bands make up the body coloration with a fourth black band ending at the tail.

A 30 gallon or larger aquarium with plenty of hiding places is suitable. Due to its aggressive behavior as an adult, it will do well in a community tank with other aggressive fish. It will not harm invertebrates or disturb the tank setting.

It will need a diet variety of meaty items, herbivore preparations, and flaked foods.