NO it is not a fish
No.
8
Octopuses don't!
Yes
No.
Depending on species you have a large variety of sizes.
On my calculations the blue ringed octopus is more dangerous than the blue lined octopus because it is very poisonous and it has no cure.
Seals, sharks, eels, and even other octopuses.
yes
Yes they are cold blooded
The octopus habitat depends on the type of octopus. The majroity of octopus makes it home on the ocean floor in cracks and crevices in the rock formations.
Fish can fish for fish, because anglerfish can fish for other fish.