FishCommonVisible while snorkeling

Indo-Pacific sergeant

Abudefduf vaigiensis

Five black "rank stripes" on a silvery body – bustling squads of sergeants are the very first welcoming committee on Hurghada's shallow reefs.

Photo: iNaturalist – (c) portioid, some rights reserved (CC BY), uploaded by portioid

The Indo-Pacific sergeant (Abudefduf vaigiensis) owes its name to five vertical black bars reminiscent of military rank stripes. Its silvery-white body is washed with bright lemon yellow along the back, making it recognisable from afar in shallow, sunlit water. It is one of the largest and most conspicuous members of the damselfish family in the Red Sea – its palm-sized body and easy open-water lifestyle set it apart from its typically secretive relatives.

Sergeants live in large, bustling crowds around shallow reef tops and jetties, feeding on plankton, algae and small invertebrates – practically omnivorous. Their breeding is a spectacle: a male cleans a patch of rock or a jetty pile, and several females may glue a purple carpet of eggs onto it. The guarding male then switches to a dark, bluish-grey "battle dress" and tirelessly chases away the wrasses and butterflyfish eyeing his eggs.

Around Hurghada you do not need to look for it – it finds you: under the boat, at the house-reef steps and in shallow lagoons the curious squads surround you immediately. For snorkelers it is the perfect first encounter with Red Sea fish, as they venture within arm's reach. As a diver, check jetty piles and wreck surfaces for the purple egg patches and the dark, patrolling males – one of the easiest examples of parental care to observe on the reef.

Did you know?

An egg-guarding male sergeant changes uniform in minutes: his silver-and-yellow livery darkens to a sombre bluish grey so he looks as menacing as possible patrolling the nest – once the eggs hatch, he changes back into civilian dress.

Where can you meet it?

It swarms on every shallow reef and around the boats: encounters are guaranteed on the reef tops of Shaab Sabina and El Aruk, in the lagoons of the Giftun Islands and at Gota Abu Ramada.

Frequently asked questions

Curiosity and habit: in many places they associate swimmers with food, so they boldly approach everyone. They are completely harmless – but please do not feed them, as it upsets the reef's natural balance.

It is one of the most reliable snorkeling encounters in Hurghada: it swims in big groups in water as shallow as half a metre, right under the surface. You often spot them before you see the reef itself.

A sergeant egg patch: thousands of tiny purplish eggs stuck to a cleaned surface, and the dark-coloured guard is the father himself. Watch calmly, but keep a little distance – right now every intruder is his enemy.