Don’t know if it’s obvious, and it’s certainly not intentional, but it might be the influence.
A.E. van Vogt’s classic SF short story Black Destroyer is, AFAIK, the first “alien loose on a space ship” story. as such, it probably inspired Jerome Bixby’s It! The Terror from Beyond Space, Alien, and other works*. The alien, Coerl, is intelligent (more so than other aliens hitchhiking on space ships), and eats phosphorus extracted from its victims. It calls the phosphorus id, for some reason.
Is it possible that speculating on an Id monster inspired the beastie, and the very plot, for Forbidden Planet? The creature has been called I]The Id Monster* by writers and critics for years (although not in the movie, nor, as far as I know, in the script). Black Destroyer was a highly visible story because, after its magazine publication, it appeared in the hugely influential SF anthology Adventures in Time and Space in 1946. This was the first major SF anthology, and it remained in print for years. several of the stories in it either inspired movies, or were closely related to them – Harry Bates’ Farewell to the Master (“The Day the Earth Stood Still”), John Campbell’s Who Goes There? (“The Thing”), Henry Kuttner and Catherine L. Moore’s The Twonky (“The Twonky”), Isaac Asimov’s Nightfall (filmed twice under the same title, but really badly), the aforementioned van Vogt The Black Destroyer, which must have influenced “It! The Terror from Beyond Space”, and Raymond F. Jones’ Correspondence Course (which was not filmed, but has very nearly the same plot as his later story The Alien Machine, which formed the first part of the book “This Island Earth”, which was later filmed under that name. The Alien Machine/Correspondence Course part was the only part they got even approximately right in the film). Most of these films (excepting the Asimov adaptations) appeared in the 1950s, so I wouldn’t be surprised if the anthology hadn’t been batted around Hollywood as a possible source for movies. Moreover, van Vogt incorporated "Black Destroyer into his 1950 “fix up” novel The Voyage of the Space Beagle, giving it more visibility
*Van Vogt sued Universal for plagiarism over this. They settled out of court. Me, I think that Bixby had a better case (his story has a different plot altogether than Black Destroyer, but one very similar to Alien, right down to the killing-it-by-opening-the-airlock at the end. But Bixby never sued.