Graneledone boreopacifica

Lore & Background

The holotype of Graneledone boreopacifica measures 9 centimetres in mantle length. A female was observed in the Monterey Canyon by the Monterey Bay Aquarium Research Institute, brooding her eggs for a record 53 months, during which the eggs were never unattended. There is no evidence that females ever feed again after laying their eggs. This brooding period also makes it the longest-living octopus, as most octopuses only live for 1 or 2 years.

Examination of the gut of this octopus revealed significant amounts of crushed gastropod shells, specifically Provanna variabilis and Lepetodrilus fucensis. The mandible muscles exhibit remarkable strength to crush the shells before digestion. The species is found in benthic zones in temperate climates.

Reader's Guide

Graneledone boreopacifica holds a unique place in marine biology due to its extraordinary reproductive strategy. The observation of a female brooding eggs for 53 months in the Monterey Canyon, documented by the Monterey Bay Aquarium Research Institute, represents the longest egg-brooding period known in the animal kingdom. This extended care, during which the female likely never feeds, also makes it the longest-living octopus, far exceeding the typical 1- to 2-year lifespan of most octopuses. The species' diet, inferred from gut contents of crushed gastropod shells (Provanna variabilis and Lepetodrilus fucensis), and its powerful mandible muscles highlight its adaptation to crushing hard-shelled prey in deep benthic environments. The type specimen, collected in the Pacific Ocean and housed at the Zoological Institute in Saint Petersburg, Russia, anchors the taxonomic identity of this remarkable cephalopod.

Did You Know?

• A female Graneledone boreopacifica brooded her eggs for a record 53 months.
• The holotype measures 9 centimetres in mantle length.
• Gut examination revealed crushed shells of Provanna variabilis and Lepetodrilus fucensis.