Benthofascis biconica is a species of sea snail, a marine gastropod mollusk in the family Conorbidae.

They are capable of "stinging" humans, therefore live ones should be handled carefully or not at all.

Below the shoulder the shell is furrowed by numerous fine spiral grooves, crossed by arcuate growth lines.

The columella is angled in the centre, spreading broadly and with a small anterior plication.

[2] This marine species is endemic to Australia and occurs off New South Wales.