Data courtesy of the Grand Comics Database under Creative Commons license.

Issue Details

Issue	#21
Published	January 1970
Cover Price	0.15
Pages	36
Editing	Stan Lee

Cover Details

Genre	superhero
Pencils	Marie Severin
Inks	Johnny Craig

20 page Sub-Mariner story "Invasion From the Ocean Floor"

Characters	GS: Lord Seth (D)
Genre	superhero
Script	Roy Thomas
Pencils	Marie Severin
Inks	Johnny Craig
Colors	Marie Severin
Letters	Artie Simek
Reprinted	in Fantastici Quattro, I (Editoriale Corno, 1971 series) #82