see text Triacanthoidei is a suborder of ray-finned fishes belonging to the order Tetraodontiformes, which includes the pufferfishes, triggerfishes and related taxa.

[1] The 5th edition of Fishes of the World does not use the superfamily classification for this taxon, listing only the suborder and its constituent families within the order Tetraodontiformes.

These include a dorsal nerve cord which is not greatly shortened, a large spine, and 2 soft rays, in the pelvic fins the spine can be locked into position.

[2] The largest species in the group are Triacanthus biaculeatus and Trixiphichthys weberi both with maximum published total lengths of 30 cm (12 in),[6] while the smallest is Atrophacanthus japonicus with a maximum published standard length is 4.4 cm (1.7 in).

[7] Triacanthoidei fishes are found mainly in the Indo-Pacific region but the family Triacanthodidae gas some species in the Western Atlantic Ocean.