Strange Object on Mars Discovered on NASA Satellite Image

A strange disc-shaped object with two ‘fin’-like parts on either side of it was discovered in a recent photograph (ESP_065515_1400) taken by NASA’s Mars Reconnaissance Orbiter on 18 July 2020 and is described as ‘Gullies in Nereidum Montes.”

Also seen are stacked rectangular objects arranged in parallel and next to each other.

Could it be some kind of spacecraft, fossilized coral, or ancient creature?

The object is approximately 10 meters across and 12 meters long.