Dumbo Octopus

Fascinating facts about the Dumbo Octopus

• Only ten specimens of Grimpoteuthis boylei have ever been recorded, making each encounter a rare glimpse into abyssal life. This pelagic umbrella octopus, nicknamed the "dumbo octopus" for its ear-like fins, reaches a total length of 470 mm (18.5 in), a size comparable to a school ruler stretched end-to-end. Its body is wrapped in a web of arms, studded with cirri between the suckers, and supported by a hard, saddle-shaped shell inside the mantle. Small fins on the mantle propel it through the water and let it crawl along the seafloor. Because only a handful of individuals are known, scientists still have much to learn about its biology, underscoring how much of the deep ocean remains a mystery.
• Grimpoteuthis boylei inhabits the abyssal plain of the Northeast Atlantic, specifically the Porcupine Abyssal Plain and Porcupine Seabight, where it dwells at depths between 4,190 m and 4,848 m (13,747-15,905.5 ft). Its likely demersal lifestyle means it lives close to the seafloor. Living at such extreme depths shields it from most human activities, contributing to its classification as "Least Concern" despite the unknown total population size.
• The life span of Grimpoteuthis boylei spans just 3 to 5 years. Within this short period, the octopus uses its small fins not only for swimming but also to crawl along the seafloor, a maneuver that aids in both locomotion and prey capture. It hovers over the bottom, scanning for polychaete worms, pelagic copepods, isopods, amphipods, and other crustaceans, then pounces and swallows its prey whole.
• When threatened, Grimpoteuthis boylei can flash a palette of colors, red, white, pink, brown, or blend perfectly with the surrounding sediment thanks to chromatophore cells. This rapid color change provides camouflage against predators such as sharks and other predatory cephalopods, which are among the few natural threats it faces in the deep sea. By altering its appearance, the octopus can disappear into the abyssal backdrop, reducing the chance of being spotted in the dim light that filters down from the surface.
• The dumbo octopus, including Grimpoteuthis boylei, is a deep-sea specialist found only in the abyssal zone.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Dumbo Octopus

Named after the Disney elephant for its ear-like fins, the Dumbo Octopus flaps these fins to "fly" through total darkness at depths where pressure would crush a submarine. It is the deepest-living of all octopus species, rarely seen and almost impossible to study in the wild.

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