Naso thynnoides

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Naso thynnoides
Naso thynnoides, offshore WA, Australia, Photo: Rick Stuart-Smith
Naso thynnoides
Naso thynnoides, Bali, Indonesia, Photo: Ian Shaw
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Naso thynnoides
Naso thynnoides


Tropical Indo-Pacific


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

Depth: 2-40m

Habitat Generalization Index: 0.69

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.

Conservation and Rarity

IUCN Status: Least Concern

Occurrence: Infrequent (1.6% 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 (114 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: Joe Shields