| Issue | #51 |
| Published | July 1972 |
| Frequency | Monthly |
| Cover Price | 0.20 USD |
| Pages | 36 |
| Editing | Stan Lee |
| Characters | Sub-Mariner; Byrrah |
| Genre | superhero |
| Pencils | Gil Kane |
| Inks | Frank Giacoia |
| Characters | GS: Namorita (O in fb); GA: Namora (D; in fb); I: Prince Merro (fb); V: Byrrah, Brotherhood of the Badoon |
| Genre | superhero |
| Script | Bill Everett, Mike Friedrich |
| Pencils | Bill Everett |
| Inks | Bill Everett |
| Letters | John Costanza |
| Reprinted | in Fantastici Quattro, I (Editoriale Corno, 1971 series) #113 |
| Letters | typeset |
| Notes | Letters from: Shirley A. Gorman; Vulcan; Matt Graham; Mitchell Johnson |