According to a specialist, the octopus is one of the most intelligent creatures on Earth, which makes it more capable of conquering the planet than other animals or insects. The latter lack the fine motor skills necessary to establish a new civilization.
The ability of octopuses to solve complex problems, communicate with their peers, manipulate objects, distinguish between virtual and real items, and use sophisticated tools suggests that, given the right environmental conditions, they could evolve into a species that would create a civilization after a potential extinction of humans.