Octopuses have a hard beak, which they use to pierce the shells of crustacean prey. The sack-like body is perched atop the head, which has two complex and sensitive eyes, while the mouth is on the underside.

The undersides of the arms are covered with suction cups that are very sensitive to touch and taste. They use their arms to 'walk' on seafloor. A ring of eight equally-long arms surround the head. Cephalopoda means “head foot” in Greek, and in this class of organisms, the head and feet are merged. Their eyes have evolved into an elongated shape to make them less visible from above.The octopus is a marine mollusk and a member of the class Cephalopoda, more commonly called cephalopods.It eats crustaceans, like mollusks and snails.The octopus lives in the mesopelagic and bathypelagic zones.Only its eyes, optic nerve, and digestive tract are opaque.The glass octopus is nearly entirely transparent.Sightings of the glass octopus are incredibly rare.For example, warming ocean temperatures, pollution, habitat encroachment, overfishing, trolling, or the depletion of food sources.

These deep-sea communities tend to avoid the majority of risks. Generally, creatures that live thousands of feet under the surface of the ocean are safer from human causes and changes to the global environment, raiding the least concern in terms of their threat of extinction. The transparent glass octopus is so rarely spotted, and so little is known about the creature that it’s unclear exactly how many examples of the species exist. Scientists believe that they have evolved into their elongated shape in order to make the octopus camouflage, and even less visible when seen from above. Their eyes can, since they are not transparent, help predators track down the glass octopus as prey. Their eyes are elongated and rectangular in shape, at least when viewed from the side. This makes these opaque elements of their bodies stand out. The only parts of the octopus’s body that are not completely transparent are its eyes, optic nerve, and digestive tract. If one is lucky enough to see this creature, they’ll notice immediately that it’s possible to see straight through to it in most places. The most interesting feature of the octopus is its nearly transparent body. There are small, widely spaced suckers on their arms in a single line. The longer legs are usually around two to three times the length of the mantle in adults. The fourth pair of arms, or the ventral pair, is shorter. The upper three pairs are mostly equal in length. The total length of an adult specimen is around 18 inches or 45 centimeters. The glass octopus is a transparent bathypelagic octopus that has a mantel of around 4.3 inches or 11 cm in length. This, in tandem with their unique glass-like bodies, helps the octopuses evade predators. No light from the sun reaches the depths at which the glass octopus resides. Marine biologists believe that the glass octopus evolved to be nearly transparent in order to hide from predators to the best of its abilities. Using technologies such as the ROV, or others like resolution seafloor mapping, to find transparent species like the glass octopus is a remarkable example of the frontiers of science. Previous to this incredible sighting, the knowledge scientist had about glass octopuses was limited to what they could derive from the remains of the creatures in predators’ digestive tracts. Now, the scientific insights are far greater. To date, this is the most important sighting of this creature, adding a great deal to scientists’ understanding of their lives and the overall understanding of our ocean. According to Live Science, the scientist spotted two glass octopuses using a remotely operated vehicle (ROV). Pacific Remote Islands Marine National Monument acquired live footage of the glass octopus, getting a closer look at these highly elusive and fascinating creatures.

Octopus predators