Sainsbury's flathead (Sunagocia sainsburyi) is a ray-finned fish of the family Platycephalidae. It inhabits marine (saltwater) waters in benthic environments. This species can reach a maximum total length of 9.7 cm. It occurs at depths between 20 and 74 metres. With a trophic level of 3.5, it is a low-level carnivore, feeding on invertebrates and small organisms.
Dorsal spines (total): 7 - 9; Dorsal soft rays (total): 11; Anal soft rays: 12; Vertebrae: 27. This species has the following characters: preorbital spines 4-5; total gill rakers on the first arch 5; bony expansion of the suborbital ridge upper base on cheek with 1-2 rows of small spines; maxilla reaching to below middle eye; papilla on upper surface of eye absent; ethmoid with a series of spines and several pairs of nasal spines; supraorbital and suborbital ridges with numerous smaller spines; no sensory tubules on cheek area below the suborbital ridge .
Behavioural data for Sainsbury's flathead is currently being reviewed.
Marine; demersal; depth range 20 - 74 m . Tropical West Pacific coasts of Australia.
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