Captain America 360, Marvel Comics, Oct 1989
"Blood in the Sea" Part 4 of 6. Story by Mark Gruenwald and Kieron Dwyer. Art by Kieron Dwyer and Danny Bulanadi. Off the Bermuda shore, an undersea battle is in progress among Captain America, Batroc, Machete, and Zaran; when suddenly a school of sharks decides to join the action! Meanwhile, Diamondback sneaks on board Baron Zemo's yacht and pilfers two of the bloodstone jewels. At the end of the day, Cap and Diamondback have two of the five bloodstone jewels and Baron Zemo has one. The hunt for the remaining two continues in Egypt. First appearance of Crossbones.
Back up story: "Conflagration" Part 3 of the Night of the Scourge. Story by Mark Gruenwald. Art by Mark Bright and Don Hudson. The U.S. Agent battles Scourge, but only one of them will be left standing by night's end!
Cover by Kieron Dwyer and Al Milgrom.
