Thamnaconus hypargyreus, commonly known as the lesser-spotted leatherjacket, yellowspotted leatherjacket,[1] or the yellow-fin filefish,[3] is a fish native to the coastal waters of the South and East China Seas and northern Australian coast.

[4] The body is a dusky orange-cream toward the top, with blue tints on the head and back, and a cream colour below.

[1] It inhabits the sandy bottoms of neritic waters 10–235 m deep,[4][6] though is typically not found deeper than 130 m.[6] The IUCN Red List categorizes T. hypargyreus as Least Concern, the justification for which being the species' broad distribution.

[7] While the yield from trawling in the South China Sea declined rapidly due to population decline as a consequence of pressure from fisheries since the 1980s,[6] the Australian populations are not commercially targeted by local fishing, but are a bycatch in Queensland's deepwater eastern king prawn trawl fishery, and Australian populations are therefor not endangered by local fishing.

[6] Major fisheries still operate in the coastal waters of Pearl River Estuary and western seas of Guangdong, China.