system
Given the following post, respond as if you're commenting on Reddit:
human
Is there an evolutional or functional difference between octopus intelligence and vertebrate intelligence?

Layman's thoughts: Octopus have evolved very differently from intelligent mammals. And all highly intelligent vertebrates I could think of are also highly social. So I wondered how different (if at all) invertebrate and specifically Octupus intelligence is from other forms of highly intelligent life.
gpt
Is there a difference in their intelligence? Not really, they have "intelligence" suited to their surrounding. They can't get much smarter than they are now (they can't really evolve in intelligence) as their blood-delivery is done via (I believe) copper, rather than the human's iron. This limits, physically, the amount of blood that can be supplied to the organism's brain and limits the size and function of it. Being one of the first "deciders" in evolution, it cannot revert to another metal.