An enormous ocean sunfish (Mola mola), caught by W.N. McMillan of E. Africa, at Santa Catalina Isl., Cal. April 1st, 1910. Its weight was estimated at 3,500 pounds.
Date Taken on 1 April 1910
Source http://hdl.loc.gov/loc.pnp/cph.3a50137 Library of Congress, Prints and Photographs Division.
Author P.V. Reyes of Avalon, California. See: Peter Victor Reyes (1875-1950), photographer, on islapedia.com
Source: https://commons.wikimedia.org/wiki/File:Enormous_Sunfish.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.