Fig. 5. — a, Outline of the Kommetje 1934 Sun-fish; the broken line represents the outline of a normal specimen. b, Cross-section of same, the broken line being the normal cross-section in Mola mola. c, Cross-section of Mola lanceolata.

Title: Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum
Year: 1898 (1890s)
Authors: South African Museum
Subjects: Natural history
Book page: https://archive.org/stream/annalsofsouthafr30193sout/#page/n719/mode/1up
Source: https://commons.wikimedia.org/wiki/File:Annals_of_the_South_African_Museum_%3D_Annale_van_die_Suid-Afrikaanse_Museum_(1931)_(18396587366).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.