Prosoproctus is a genus of velvetfish native to the South China Sea where it occurs at depths of from 69 to 82 metres (226 to 269 ft).

[6] The name of the genus, Prosoproctus prefixes proso, meaning "in front", to proctus, which means "anus", an allusion to the anus being positioned immediately behind the base of the pelvic fins instead of close to the origin of the anal fin.

[7] Prosoproctus has frontal, parietal and infraorbital bones which are not heavily armoured.

[8] It has tubed front nostrils positioned far forward on the snout with elongated and flattened preopercular and preorbital bones.

[9] Prosoproctus has only been recorded from the South China Sea where this demersal fish has been caught from depths between 69 and 82 m (226 and 269 ft).