Overview
Before the "Silver Age", stories involving gorillas were inordinately popular in other media, most notably movies such as King Kong and Mighty Joe Young. The comic book industry attempted to cash in on this craze, and similarly increased the appearance of gorillas in their media. This continued into the 1970s, reflecting the continued popularity of "gorilla movies" such as Planet of the Apes. In the late 1980s, the appearance of gorillas in comic books sharply declined, partly due to the decreasing depictions of them in other media, as well as the end of the Silver Age of Comics, and the backlash against "silly" plot-devices in the comic book form.
Read more about this topic: Gorillas In Comics