Thread:ThunderStar321/@comment-36319752-20180725010224/@comment-31440879-20180825155432

Fifth bullet point in my second comment explains this. To elaborate further: the Guidelines say that images in the gallery should not be repetitive. We already have an in-game sprite of the Crabsquid egg, which is identical to yours except it has a background. So, your image would not add much to the page.