La Vie Parisienne was the Art Nouveau equivalent of Playboy - a French humor magazine that tended toward the baudy side, with lush and sensual illustrations and the rare photograph of women in deshabille. Cover artist Herouard was responsible for many of these, and his love of mermaids makes this particular magazine a favorite among sirenophiles. The magazine ceased publication in the early 1930s, though the title was picked up by an adult magazine producer in the 1960s and early 1970s (though this was far less classy).
  

The British Puck, Punch were similar humor magazines that followed the same type of format, though not quite to the extremes that La Vie Parisienne did. Puck’s format tended to be more sarcastic and snarky, while Punch was the “official” humor magazine of the British empire, and tended to reflect (and occasionally lampoon) upper crust sensibilities.

Life was an American publication out of Boston, and featured some wonderful mermaids from their introduction in the late 1880s to the time they ceased publication in 1929, when the name was bought up by Henry Luce for his new photojournalism magazine. Among others Life featured the work of Charles Dana Gibson, whose Gibson Girls (including a number of mermaids) practically defined the era. Judge was a contemporary publication out of New York.