…apparently, I can post here. So I think I might as well. Either of you two are free to delete this post if you wish.
Caduceus, what I believe happened is that you two found different pictures of the same thing, and happened to write similar descriptions because you both saw the same thing. If the only comparable parts are in the surface appearance, there's not enough evidence to call plagiarism here. Furthermore, MurderOfRavens wrote up the piece as an SCP, which is fundamentally different from the CI format you're aiming for.
You're going to have to show some substantial line example comparisons (of function and not appearance) if you want to call "too" similar. It's a rather understandable coincidence.
Also, I think it'd be best if you could contact SCP staff when handling potential plagiarism issues, since the sandbox site is under SCP wiki jurisdiction, not CI-data wiki.