1) Octopuses have 8 arms with two rows of suckers around their soft body and no skeleton. They have a large head containing big eyes, brain, and beak.
2) They live in oceans and seas, hiding in rocks and coral reefs. They hunt at night and camouflage themselves during the day using color changing abilities.
3) Octopuses reproduce by the female laying up to 150,000 eggs in a den, which she guards until they hatch about a month later, not eating during this time and dying of exhaustion.