The nurse shark (Ginglymostoma cirratum) is a large, sluggish, bottom-dwelling shark that is generally harmless unless provoked. It has very strong jaws, a stout body, and a wide head with obvious barbels (thin, fleshy, whisker-like organs on the lower jaw that sense touch and taste)..

The Grey Nurse Shark, Carcharias taurus grows to a length of 3.6m. Males mature at 2.1m and females at 2.2m.

Provides the opinions of Jim Bourdon on fossil shark teeth ...