Fred
The whole species of octopus is not entirely endangered, but there are some subspecies that are endangered, threatened, or close to being endangered: The Giant Octopus, a giant but gentle octopus, is listed as "Endangered" on the ICUN Redlist.
Whenever it feels threatened.
That funnel-shaped opening beneath an octopus's head is called a siphon. The black fluid that it secretes when threatened is actually ink, which the octopus uses as a defense mechanism to create a cloud and confuse predators.
They are not endangered. Nor are they threatened. They are in fact sensitive to polluted waters.
when it is threatened
unicorns, bigfoot, beavcoons, hippogriffs, tree octopus, elves and trolls, etc...
Of the two species of elephant, the Asian Elephant is endangered and the African Elephant is currently considered vulnerable. There is some debate about the conservation status of the African Elephant. No octopus is currently on the Endangered or Threatened list, however little is known about the population sizes for most octopus species.
The blue-ringed octopus is a small but highly venomous marine animal found in the waters of the Pacific and Indian Oceans. It is recognized by its bright blue rings that appear when the creature feels threatened. The venom of the blue-ringed octopus is powerful enough to cause paralysis and even death in humans if not treated promptly.
No they don't. They use chromataphores to make blue rings around their tentacles when they feel threatened. It is used as a warning sign.
Yes, a common octopus is a type of octopus
Some species of octopus are considered vulnerable or endangered due to factors such as overfishing, habitat destruction, and pollution. It is important to monitor their populations and protect their habitats to ensure their survival.