well it depends what species of octopus you're talking about. if its in captivity they live only 1 year but in the wild giant pacific octopuses live 5 to 6 years. but other species live only 6 to 8...
Yes
Because it has 8 legs and octo means 8.
Yes, a common octopus is a type of octopus
u can get it at a pet store.