A large sawfish brought alongside for tagging. The rostrum is the protruding " saw" and its tooth-like appendages are called "denticles."
Date
Source http://www.photolib.noaa.gov/htmls/fish1952.htm
Author NOAA
Source: https://commons.wikimedia.org/wiki/File:Pristis_sp.jpg

The smalltooth sawfish or wide sawfish (Pristis pectinata) is a sawfish of the family Pristidae. It is found in shallow tropical and subtropical waters in coastal parts of the Atlantic, including the Mediterranean.