Naso thynnoides, offshore WA, Australia, Photo: Rick Stuart-Smith
Naso thynnoides, Bali, Indonesia, Photo: Ian Shaw
Narrow torpedo-shaped body, pale grey colouration with yellowish tint on back and side, fine broken bars on side,and a large black eye. Usually schools on deeper reefs.
Max Size: 40 cm
Sea Temperature Range: 23.6-31.2°C
Habitat: Coral Reef, Rocky Reef
Habitat Generalisation Index: 0.7
Also referred to as the SGI (Species generalisation index), this describes the habitat niche breadth of the species.
Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most
hard substrates within their range (generalists). Learn more here
IUCN Threat Status: Least Concern
Occurrence: Infrequent (2% of sites)
Occurrence describes how often the species is found on surveys within its distribution.
It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed
Abundance: Large aggregations (119 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.