Crossing.

Crossing two different animal species can lead to unpredictable outcomes and often has serious consequences. Crossing an elephant with an octopus is therefore not possible, as the two animals are too different in their physical and genetic characteristics. Such a crossing would not only be immoral and unethical, but also impossible.

There are a number of hypothetical possible outcomes if crossing an elephant and octopus were successful, but none would likely be beneficial. Some of these outcomes are described below:

1. Physical limitations
   
   The octopus has no skeleton and is mainly composed of soft tissue, while an elephant has a huge skeleton that is necessary to support their large body. Combining these two different structures would lead to a physical being with limitations and incompatible properties. It is very likely that such an intersection could not live.
   
2. Incompatible genetics
   
   Another big problem would be that the genetics of these two animal species are not compatible. They have different chromosomes, DNA and genetic coding. This means that it is very unlikely that an embryo could arise from the crossing of an elephant and an octopus.
   
3. Ethics and morals
   
   In addition, such a cross would be unethical from an animal welfare and moral point of view. It is a cruel experiment that would endanger both the welfare and the lives of the animals involved. Crossing two different animal species just for human curiosity would not be ethical and moral.
   

Basically, crossing an elephant and an octopus is impossible. The idea of a cross between these two creatures is absurd and cannot be implemented without dire consequences. Instead of speculating on such unrealistic scenarios, we should focus on protecting our natural environment and improving the welfare of all animals.