I was initially very excited about this one - (sorry, but it is not anomalous). An object glinting in the sun caught the rover team's attention, and they spent the next few days investigating. Though this object appears unusual when viewed on the surface of Mars, the rover team concluded that we are just seeing an ordinary piece of plastic torn from the rover.
It was photographed by the Mars Curiosity Rover on Sol 65 using the Mars Hand Lens Imager to give us a close up view. There are six images of the object which were used to make what appears to be motion in the video - these frames show the object over time and from two different angles.
The black pixels that appear to move during the video are part of the original images, and likely bad pixels or dust on the lens cover.
This intriguing image below from Gusev crater is of an object which is extremely similar to a spine. It was discovered by Mars Anomalies member, convex: