I discover a species that is quite strong.

[wmCmo]

So I've been playing with the simulator and found this species. It is quite strong for the following reasons:

• It has a mechanism that lets it spread super fast.
• It mutates but will remain the identical look (It looks like a berry to me.)
• They create a wall of killer cells while spreading, making a large organism have a tough time getting through.
• They survived even when living with the smallest cruelest hunter.
  

[AxoWasTaken]

I put one in an environment filled with only unnatural-engineered organisms and in seconds it spread to the other side of the world. Its very strong!