Comic Title: Sea Devils #18
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Jul/Aug 1964
On Sale Date: May 21, 1964 Newsstand Date May 21, 1964
Source: House Ad, Rip Hunter... Time Master #21, Page 19

Copyright Date May 21, 1964
Source: Library of Congress, Periodicals 1964

Frequency: Bi-monthly
Cover Price: $0.12
Page Count: 32
Circulation: 203520
Editor: George Kashdan

Title: "The Creatures from the Sub-World"
Pages: 25

Feature(s):
Sea Devils (of Earth-1)

Penciller: Howard Purcell
Inker: Sheldon Moldoff

Feature Character(s)

• Sea Devils (last appearance in Sea Devils #17; next appearance in Sea Devils #19)
• Dane Dorrance (last appearance in Sea Devils #17; next appearance in Sea Devils #19)
• Biff Bailey (last appearance in Sea Devils #17; next appearance in Sea Devils #19)
• Judy Walton (last appearance in Sea Devils #17; next appearance in Sea Devils #19)
• Nicky Walton (last appearance in Sea Devils #17; next appearance in Sea Devils #19)

Villain(s)

• Captain Jared Hood (an old foe of the Sea Devils; no further appearances)

Other Character(s)

• The inhabitants of a sunken world (die in this story; no further appearances)
• The crew of a merchant vessel (no further appearances)

Comments:
Chap. 2: "The Sea Devil Creatures"
Chap. 3: "The Doom of the Crusher Plant"

Synopsis:
Strange underwater men attack a merchant ship and steal a cargo of coffee. The Sea Devils track the men through an underwater tunnel that leads to a world containing prehistoric creatures. Upon their arrival in the strange world, the Sea Devils undergo a startling transformation whereupon they physical change into creatures.

The team is then captured by the creatures, the leader of which is an old enemy of theirs, Captain Jared Hood. Hood explains that the inhabitants of this world were once human. He has developed a cure and is extorting them for their help.

The Sea Devils escape and attempt to discover a cure themselves. Nicky and Biff reach the outside world, where they regain their normal appearance. When they return, they incite the inhabitants to overthrow their leader. Hood takes revenge by killing them. The Sea Devils survive and capture Hood, returning him to the surface where he is incarcerated.