Yellowtail anthias (Pseudanthias flavicauda) is a ray-finned fish of the family Anthiadidae. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 6.6 cm. It occurs at depths between 30 and 61 metres. With a trophic level of 3.3, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.
Dorsal spines (total): 10; Dorsal soft rays (total): 16; Anal spines: 3; Anal soft rays: 7; Vertebrae: 26. Body depth 3.1-3.3 in SL; head length 3.15-3.3 in SL. Posterior edge of orbit without papillae. Caudal fin deeply emarginate to lunate, the caudal concavity 1.05-2.5 in HL. Body of males magenta with a large predominantly yellow area on back between base of 4th dorsal spine and 4th or 5th dorsal soft rays; head pink, suffused with yellow dorsally, with a pink-edged yellow band from eye to pectoral-fin base; fins mainly yellow except anal which is lavender with a yellow band; its upper lip slightly fleshy and finely papillae anteriorly, but not developed to a protuberance; its third dorsal spine moderately elongate, 1.5-1.95 in HL. Females orange-pink, shading to pink ventrally, the scales dorsally on body with dusky yellow centers; caudal fin bright yellow .: fusiform / normal; Cross section: compressed.
Behavioural data for Yellowtail anthias is currently being reviewed.
Marine; reef-associated; depth range 30 - 61 m . Tropical recorded from Tonga (Ref.
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