''Cirrothauma magna'' is a species of deep-sea
cirrate 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 in ...
'', 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
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