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Beautiful blue in the ocean caves Western Blue Devil

Noongar word - Djiljit (fish)

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The Western Blue Devil is also known as the Blue Devilfish. These fish are solitary cave dwellers. They hardly ever leave the rocky reefs, caves and crevices that are their home. These fish are territorial and can be found at depths between 5m and 45m.

Threats include; habitat destruction, over-fishing and pollution.

Where you can find a Western Blue Devil

Conservation Status

The waters around Rottnest Island are a designated Marine Reserve. Some parts of Rottnest’ coral reefs are included the Marine Sanctuary Zones shown in the Rottnest Island Marine Management Strategy (2007).

  • Extinct
  • Extinct in Wild
  • Critically Endangered
  • Endangered
  • Vulnerable
  • Near Threatened
  • Least Concerned

Help keep Rottnest’s beaches and reefs healthy

  • Do adhere to fishing limits
  • Do anchor only in sandy areas of water
  • Do take litter with you or use bins provided

Western Blue Devil Gallery

Hey there! Did you know...

Blue Devilfish are known to live up to 59 years!

Want to know more?

Download the Western Blue Devil fact file!

Coral Reefs

Coral (Hard Coral)

Sea Cucumber