Pseudanthias evansi

Serranidae
Yellowback Anthias, Goldback Anthias, Goldback Basslet, Purple Wreckfish, Two-coloured Coral Perch, Yellowback Anthias, Yellowback Basslet, Yellowback Queen Basslet, Yellowtail Basslet
  • Pseudanthias evansi, Maldives, Photo: Rick Stuart-Smith
    Pseudanthias evansi, Maldives, Photo: Rick Stuart-Smith
  • Pseudanthias evansi, Maldives, Photo: Rick Stuart-Smith
    Pseudanthias evansi, Maldives, Photo: Rick Stuart-Smith
Distribution
Tropical Indo-Pacific
Description
Both male and female with purple body and yellow back, dorsal fin and tail. Indistinct yellow stripe from snout through eye, to pectoral fin and fine yellow spots on body. Differs from similar P. tuka (Purple Queen) female by yellow dorsal fin and from male by yellow tail. An Indian Ocean species, in Australia only found at Christmas Island. Occurs in large groups on outer reef slopes. Length to 12cm.
Information
  • Max Size: 12 cm
  • Sea Temperature Range: 25.9-30.8°C
  • Depth: 4-40m
  • Habitat: Coral Reef
  • Habitat Generalisation Index: 0.4
    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
Rarity
  • Threats: Habitat degradation
  • IUCN Threat Status: Not Evaluated
  • Occurrence: Common (33% 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 (584 per transect)
    Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: Joe Shields
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