Bloch's sand diver (Trichonotus blochii), first described by Castelnau, 1875 is a small fish in the family Trichonotidae (order Gobiiformes). Adults typically reach 14.30 cm in maximum length. It inhabits marine coastal and open-ocean environments. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator.
Dorsal spines (total): 5 - 7; Dorsal soft rays (total): 43 - 46; Anal spines: 1; Anal soft rays: 39 - 41; Vertebrae: 55. This species is distinct with the following set of characters: D V-VII,43-46; A I,39-41; lateral line scales 57-60; gill rakers 4-6+17-21; vertebrae 55; head length (HL) 18-20% SL; snout length 25-31% HL; infraorbital and supraorbital canals separated anterior to eye; elongated dorsal fin spines in males 4-6; caudal fin in males with 2 black stripes .: elongated; Cross section: circular.
Behavioural data for Bloch's sand diver is currently being reviewed.
Marine; benthopelagic. Tropical Indian Ocean to Western Pacific: northern Australia.
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