Late Carboniferous period about 300 million years ago. Edestus had teeth that kept growing beyond the tip of its snout - looking for all the world like a fish with toothy pinking shears mounted on its nose.
Edestus giganteus, was largest of the Edestus species. It was 6 metres (20 feet) long (about the same size of the modern white shark) and a super-predator of its time.
As is the case with many prehistoric sharks, Edestus is known mainly by its teeth,which have persisted in the fossil record much more reliably than its soft, cartilaginous skeleton.