An anomaly hunter scouring NASA images of Mars for strange and unusual objects spotted a peculiar oddity which he believes is a petrified fish that once resided in the oceans of the Red Planet. The peculiar find was made by indefatigable UFO researcher Scott C. Waring as he was studying photos captured by the Mars Curiosity Rover. At the bottom of one particular photo, he noticed a rather curious shape that, upon further inspection, appears to be that of a fish with a clearly visible tail fin.
More on this very weird story at the Coast to Coast AM website.