Illustration of a porbeagle (Lamna nasus) from Fishery Bulletin of the Fish and Wildlife Service Vol.53.
Date 1953
Source http://www.nefsc.noaa.gov/lineart/porbeagle.jpg
Author US Dept of the Interior, Fish and Wildlife Service
Source: https://commons.wikimedia.org/wiki/File:Lamna_nasus_drawing.jpg

The porbeagle or porbeagle shark (Lamna nasus) is a species of mackerel shark in the family Lamnidae, distributed widely in the cold and temperate marine waters of the North Atlantic and Southern Hemisphere.