Engraving of Sunfish Mola mola, from the Natural History of Useful Aquatic Animals.
Date circa 1880
Source http://www.photolib.noaa.gov/historic/nmfs/figb0291.htm
Author H L Todd
Source: https://commons.wikimedia.org/wiki/File:Mola_rotunda.jpg

The ocean sunfish or common mola (Mola mola) is the heaviest known bony fish in the world. The ocean sunfish is native to tropical and temperate waters around the globe. Mola mola resembles a fish head with a tail, and its main body is flattened laterally.