Credit goes to you too laserdance as it would not of been found without you, I have seen this type of anomaly in many images and still have no idea what they are doing there.
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"Creating a fiction when stating a fact destroys the credibility of the truth one are trying to convey"
laserdance It does not look like an animal or insect to me, it is possible there are smaller lifeforms eroding the rock, but what has got my attention is that there seems to be an overlay in the image, if you look at the top the channel in the official image (just a little further top right of your image) you will see a feint number 8 character surrounded by circular characters and blurring overlaying the background, at first I thought it could be an image stamp, but you would expect an image stamp at the top of bottom of the image.
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"Creating a fiction when stating a fact destroys the credibility of the truth one are trying to convey"