Caulerpa hedleyi is a species of seaweed in the Caulerpaceae family.
The seaweed has a robust stolon with erect grey-green fronds reaching 3to in height and 1to wide.
The species is found in deep heavily shaded waters. In Western Australia, it is found along the coast from Rottnest Island and south as far as Esperance in the Goldfields-Esperance region of Western Australia and east to South Australia.