Tetrosomus concatenatus (Bloch, 1785)
Triangular boxfish
photo by SFSA

Family:  Ostraciidae (Boxfishes)
Max. size:  30 cm TL (male/unsexed)
Environment:  reef-associated; marine; depth range - 60 m
Distribution:  Indo-West Pacific: East Africa to southern Japan and New Caledonia (Ref. 11897).
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 9-9; Anal spines: 0-0; Anal soft rays: 9-10. Males with blue line and spots that fade rapidly (Ref. 3141). Description: Characterized further by pale grey to yellowish brown color with darker brown network of hexagons and small blue spots or large spots enclosing stellate pale lines; triangular carapace with moderately elevated dorsal ridge containing two small spines on middle portion; straight to slightly concave dorsal profile of snout; truncate to slightly rounded caudal fin; dorsal and ventral ridges of postlarval juvenile with large spines (Ref. 90102).
Biology:  Enters muddy bays or estuaries; usually with large remote sponges (Ref. 48637). Solitary. Also found in seagrass and weed bottoms of coastal reefs (Ref. 90102).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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