Source: neat-stuff-blog.blogspot.com
Here are some amazing pieces from an Italian illustrator named Walter Molino. These illustrations (1957-59) come from an Italian newspaper called, "La Domenica del Corriere."
Source: neat-stuff-blog.blogspot.com
Diver being attacked by giant octopus during dive, by Achille Beltrame, illustration from La Domenica del Corriere, 25th October 1908
Source: itsdeadlicious.com