The ‘jellyfish’ in NASA’s Mars rover image appears to have a single pixel 1-colour, solid black, double strike line across the artifact. Minor antialiasing and compression has very slightly blurred the lines.

• The 'jellyfish' in NASA’s Mars rover image appears to have a single pixel, solid black, double strike line across the artifact.
• The lines are likely part of the image, not the object under the lines, and this is not the first time such a feature has been observed.

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