Dischistodus fasciatus
Pale grey damselfish with bold dark bands, logged across Java and Palawan reefs in warm 27-29C water year-round.
A small, deep-bodied damselfish around 8 cm, with a pale grey to whitish body crossed by several dark vertical bands running from the back down the flanks. The tail is usually plain and unbanded, which helps separate it from other boldly striped damsels. It holds a stocky, almost oval profile close to the substrate rather than the slimmer shape of open-water damselfish.
Divers typically find it hovering low over rubble patches and coral bases rather than out in open water, sticking close to a patch of reef it treats as home turf. Like most damselfish it will dart forward at intruders that get too close to its territory before darting straight back to cover, but it is not aggressive toward divers and mostly ignores anyone who keeps a respectful distance.
Damselfish in this genus tend patches of algae on the reef floor almost like a garden, chasing off other grazers to protect their food supply, so a hovering individual is often guarding a specific patch of turf rather than just resting.
No clear seasonal pattern shows up in the sightings, and with a comfortable range of 27.6 to 29.3C it stays active on these reefs year-round, so any month works for a visit to Java, Palawan or Sabah.
Reef neighbours a diver could mistake it for. Use the identification notes above to tell them apart.
Most reliably logged on reefs in Java, Indonesia and Palawan in the Philippines, with a smaller but steady presence in Sabah, Malaysia. Sites in these three countries account for the bulk of confirmed sightings, and it turns up as an uncommon find rather than a guaranteed one wherever it is reported.
Mapping where Banded Damselfish is logged…
They show up most often on reefs in Java, Indonesia and Palawan, Philippines, with smaller numbers reported from Sabah, Malaysia. Across all these sites it is logged as an uncommon sighting rather than something you will see on every dive.
There is no strong seasonal pattern in the sightings, and the water it favours stays around 27.6 to 29.3C year-round, so it can be found on these reefs in any month.
Look for a small, stocky damselfish with a pale grey body marked by several bold dark vertical bands, and a tail that stays plain rather than banded. It usually sits low over rubble or coral rather than swimming in open water.
They are a small reef fish, reaching around 8 cm in length, which keeps them easy to overlook against rubble and coral rock unless you are looking closely.
No. They are not considered dangerous to divers and will only dart toward you briefly if you get close to their patch of reef before retreating to cover.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Yellowtail Clownfish
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