Bipalium worms are often called hammer-heads due to the shape of their heads-duh!
This one was found in Mulu National Park in Borneo.
These worms are predatory-just listen to what Wikipedia had to say on the subject of Bipalium feeding:
To feed on its prey, a flatworm extends its pharynx out from its mouth on the mid-ventral portion of its body and secretes enzymes that begin digestion of the earthworm external to the flatworm. The liquefied earthworm tissues are sucked into the branching gut of the flatworm by ciliary action.