Does an octopus bite

No- they'd break their beaks if they tried! Giant octopus are strong, but not so strong as to be able to do THAT. Instead, octopus make their homes in undersea burrows beneath rocky clefts, small underwater caves, and anywhere else that can provide shelter, including the wrecks of sunken ships. Contrary to popular belief, they are not dangerous to humans and tend to be very shy of them.