Whitespotted Triggerfish

Canthidermis Maculata
Whitespotted Triggerfish - Marinewise © 2026 MarineWise

Quick Facts

Scientific name Canthidermis Maculata
Other names Oceanic Triggerfish, Rough Triggerfish, Spotted Oceanic Triggerfish
Size Up to 50 cm (19.68 in)
Weight Up to 2.5 kg (5.5 lb)

Distribution

Habitat & AU Distribution Coastal & oceanic waters amongst steep reef edges, slopes & floating debris
Depth Range 10–100 m (33–330 ft)
Whitespotted Triggerfish Distribution

Interesting Info

  • The Whitespotted Triggerfish is a true ocean traveller — instead of living on reefs like most triggerfish, it spends its life cruising the open sea.
  • In Australia, they’re mostly seen in the offshore waters of Queensland, the Northern Territory, and Western Australia.
  • Its body is dark and covered in tiny white spots, almost like it’s been splashed with paint. The fins shine with a hint of blue or green when the light hits just right.
  • These fish can grow up to about 50 cm (20 in) long, though many you’ll see are smaller. Their flat, oval-shaped bodies help them glide through mid-water with ease.
  • Unlike bottom feeders, they’re plankton pickers — eating drifting jellyfish, tiny crabs, and other small sea creatures floating near the surface.
  • They often gather in schools under floating logs, seaweed mats, or even bits of drifting rubbish, using the shade and cover as protection.
  • They’re usually found from 10–100 m (33–330 ft) deep, but most are spotted right near the surface where floating debris drifts.
  • They reproduce by releasing eggs into the open ocean, letting currents carry them until the larvae grow large enough to swim on their own.
  • They can live around 7–10 years, though exact studies are still limited.
Species Interaction

Minimal Species Contact

If you’re snorkelling far offshore and find a drifting log or patch of seaweed, keep your eyes peeled — you might see a group of spotted, silvery triggerfish gliding just below the surface. They don’t come close to shore and rarely interact with people, which makes spotting one a special offshore surprise.

Scientific Classification

Kingdom: Animalia

Phylum: Chordata

Class: Actinopterygii

Order: Tetraodontiformes

Family: Balistidae

Genus: Canthidermis

Species: Canthidermis Maculata

Conservation Status

The Whitespotted Triggerfish is listed as Least Concern by the IUCN. It has a wide Indo-Pacific distribution and is not directly targeted by fisheries. However, it is often taken as bycatch in tuna purse-seine nets, and floating debris pollution may affect the drifting habitats it relies on.

Fish Taste Quality

Whitespotted Triggerfish are not eaten in Australia, and not recommended because of the risk of ciguatera poisoning. In other countries, people sometimes eat them, but they’re not prized.

Taste Rating: 0/5

Elusive / Overlooked Species

Finding: Intermediate

Temperament: Peaceful

Location: Offshore

Danger: None