Calvin

Calvin is the name given to the Martian alien and main antagonist of the 2017 movie "Life". This species is believed to have wiped out all life on Mars, therefore making it an apex predator.

Each cell belonging to Calvin is a muscle, a nerve and an eye at the same time. It is semi-intelligent.

Calvin was presumed to be a species whom lived on mars and dominated the Martian soil, In a "hibernation" state the crew wake Calvin up, it's first priority is clearly to grow, second... ravage the crew.

Upon killing most of the crew, Calvin is tricked into getting into an escape pod that was supposed to be heading out into deep space far from Earth. However, the pod hit some debris after undocking and flies off course, reentering the atmosphere and landing in Vietnam. We are left with a cliff-hangar as the credits role in just after some unknowing fishermen open the shuttle-hatch, revealing Calvin still alive and holding the surviving male crew member inside. Our only two assumptions are that Calvin was killed later by military forces or wiped out all life on Earth.