''Cirrothauma magna'' is a species of deep-sea

cirrate Cirrina or Cirrata is a suborder and one of the two main divisions of octopuses. Cirrate octopuses have a small, internal shell and two fins on their head, while their sister suborder Incirrina has neither. The fins of cirrate octopods are asso ...

octopus that has been found in the Indian, Atlantic, and Pacific oceans. It is known from only 4 specimens. Their shells are somewhat saddle-shaped. ''C. magna'' is the sister taxon of ''

Cirrothauma murrayi ''Cirrothauma murrayi,'' commonly called the "Blind cirrate octopus," is a nearly blind octopus whose eyes can sense light, but not form images. It has been found worldwide, usually beneath the ocean's surface. Like other cirrates, it has an int ...

'', but can be readily distinguished by having large and well developed eyes (whereas ''C. murrayi'' is near blind). ''Cirrothauma magna'' is likely the largest species of cirrate octopus, one female specimen measuring 1.7 m total length.

References

Octopuses {{octopus-stub