But shark teeth come in many shapes and sizes ... The minerals present in the sediment in which it fossilised have turned this tooth black. Sharks belong to a group of fish called Chondrichthyes.

(Graham Thompson/CBC) A Saint John auction house has opened online bidding on a collection of megalodon shark teeth that are millions ... grey and black. The megalodon species was known ...

A Spanish shark research organisation ... It is referred to as the black devil due to its dark colours, sinister looking sharp teeth and monstrous shape. Condrik researchers said they spent ...