Abudefduf septemfasciatus

Lore & Background

Abudefduf septemfasciatus is a non-migratory marine fish associated with lagoons and coral reefs found at depths of 0 to 3 m (0 to 10 ft). The species is highly territorial and feeds on benthic algae and various invertebrates. It is oviparous, with individuals forming distinct pairs during breeding and males guarding and aerating eggs. The species occurs in the Indo-Pacific, ranging from East Africa to the Line and Tuamotu Islands, north to southern Japan, and south to the southern Great Barrier Reef.

Reader's Guide

The banded sergeant is a well-known damselfish within its range, recognized for its territorial nature and its presence in shallow lagoon and reef habitats. Its maximum size of 23 cm makes it one of the larger damselfish species. The species' reproductive behavior, including pair formation and male egg-guarding, is typical of many damselfish. Its diet of benthic algae and invertebrates places it as an important grazer in shallow reef ecosystems. The species is not migratory, remaining in its local reef or lagoon environment throughout its life. Its wide distribution across the Indo-Pacific, from East Africa to the Line and Tuamotu Islands and from southern Japan to the southern Great Barrier Reef, underscores its adaptability to various tropical marine conditions.

Did You Know?

• Abudefduf septemfasciatus can reach 23 cm (9.1 in) in total length.
• Males guard and aerate the eggs after breeding.