Enneapterygius rufopileus, Batemans Bay, NSW, Photo: Andrew Green
Enneapterygius rufopileus, Lord Howe Island, NSW, Photo: Andrew Green
Temperate Australasia, Tropical Indo-Pacific
Female mottled brown with small saddles along back Male with reddish with black head, rear half of body often dark with two white bands. Usually narrow white or light bar at tail base. First dorsal fin is noticeably shorter than second in females (50% of height) and slightly shorter in male (75% of height). Similar E. atrogulare (Ringscale Threefin) has comparatively longer first dorsal fin (at least 75%, but often same height as second dorsal). Males of numerous other Enneapterygius threefins have black heads, including E. larsonae (Blackhead Threefin) and E. similis (Masked Threefin).
Max Size: 4 cm
Sea Temperature Range: 18.7-25.2°C
Habitat: Coral Reef, Rocky Reef
Habitat Generalisation Index: 12.2
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: Not Evaluated
Occurrence: Common (25% 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: Many (27 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.