Each arm is lined with suction cups, which the octopus uses for various purposes, such as catching prey, manipulating objects, and exploring its environment. These creatures have long been a subject of intrigue due to their unique physical characteristics and remarkable intelligence.Īt first glance, an octopus may appear to have eight tentacles, but in reality, it has eight arms. Octopuses belong to a group of marine animals called cephalopods, which also includes squids and cuttlefish. To understand whether they have arms or tentacles, it’s essential to delve into their basic anatomy. Octopuses are fascinating creatures that inhabit the depths of the ocean.