I think JoeAltmaier (your parent commenter) still has a point.

If the leap in complexity of octopuses is so obvious that we can tell it's an alien, do you mean other earlier life in our planet was not alien? That would not make sense because it would be hard to imagine that two independent evolutions of life led to the same protein-based, DNA-based life. So the only reasonable theory is that both the earlier life in our planet as well as octopuses are aliens which is JoeAltmaier's point.