Comic Title: Superman's Pal Jimmy Olsen #20
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: April 1957
Approx. On Sale Date: February 26, 1957 Copyright Date February 24, 1957
Source: Library of Congress, Periodicals 1957
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

Frequency: Monthly, with the exception of Jan., May, July, and Nov.
Cover Price: $0.10
Page Count: 32
Editor: Mort Weisinger

Title: "The Merman of Metropolis"
Pages: 8

Feature(s):
Jimmy Olsen (of Earth-1)

Writer: Otto Binder
Penciller: Curt Swan
Inker: Ray Burnley

Reprinted In:
Showcase Presents:Superman Family Vol. 1 TPB (2006)

Feature Character(s)

• Jimmy Olsen (last appearance in Superman's Pal Jimmy Olsen #20; next appearance in Action Comics #228)

Supporting Character(s)

• Superman (last appearance in Superman's Pal Jimmy Olsen #20; next appearance in Action Comics #227)
• Perry White (last appearance in World's Finest Comics #87; next appearance in Action Comics #227)
• Lois Lane (last appearance in World's Finest Comics #87; next appearance in Action Comics #227)

Other Character(s)

• A mermaid puppet (no further appearances)

Synopsis:
While fishing, Jimmy is pulled underwater and meets a mermaid. The mermaid gives Jimmy a magic ring that lets him breathe underwater. Over the next few days Jimmy performs several underwater feats and rescues.

Superman has actually hoaxed Jimmy. Using his powers, Superman has faked Jimmy's ability to breathe underwater. Jimmy accidentally got an ink stain on his hand that reveals Superman's secret identity. Superman has perpetrated the hoax to get Jimmy to remain in salt water which causes the stain to wear off before Jimmy can see it. When the stain is gone, Superman ends the hoax, never telling Jimmy why he did it.