18/01/2026
Scientists documented an extraordinary case of a deep-sea octopus mother protecting her eggs for more than 4.5 years, setting the longest egg-guarding record ever observed in the animal kingdom. The discovery was made by researchers from the Monterey Bay Aquarium Research Institute (MBARI) while studying the deep waters of Monterey Canyon, off the coast of California.
The octopus belonged to the species Graneledone boreopacifica. After laying her eggs on a rocky surface deep underwater, the mother stayed with them continuously for about 53 months. During this entire period, she carefully guarded the eggs, cleaned them, and used her arms to circulate oxygen-rich water. Scientists never observed her leaving to feed, and she appeared to slowly weaken over time.
When the eggs finally hatched, the mother octopus passed away shortly afterward, which is normal for octopus species. This remarkable behavior highlights the extreme dedication of octopus mothers and how life in the deep sea can follow very different biological timelines.
Scientists documented an extraordinary case of a deep-sea octopus mother protecting her eggs for more than 4.5 years, setting the longest egg-guarding record ever observed in the animal kingdom. The discovery was made by researchers from the Monterey Bay Aquarium Research Institute (MBARI) while studying the deep waters of Monterey Canyon, off the coast of California.
The octopus belonged to the species Graneledone boreopacifica. After laying her eggs on a rocky surface deep underwater, the mother stayed with them continuously for about 53 months. During this entire period, she carefully guarded the eggs, cleaned them, and used her arms to circulate oxygen-rich water. Scientists never observed her leaving to feed, and she appeared to slowly weaken over time.
When the eggs finally hatched, the mother octopus passed away shortly afterward, which is normal for octopus species. This remarkable behavior highlights the extreme dedication of octopus mothers and how life in the deep sea can follow very different biological timelines.