The giant Pacific octopus (Enteroctopus dofleini) is the world’s largest octopus species and one of the ocean’s most intelligent invertebrates. Found throughout Alaska’s cold, rocky coastal waters, these remarkable animals captivate scientists and visitors alike with their intelligence, problem-solving ability, and extraordinary sensory systems.
Record Breakers
The giant Pacific octopus holds multiple world records:
- Largest octopus: Largest confirmed specimen weighed 156 lbs with a 23-foot arm span
- Fastest color change: Can shift color in under 300 milliseconds
- Most neurons outside the brain: Two-thirds of their 500 million neurons are distributed through their eight arms — each arm can taste, touch, and act semi-independently
Intelligence and Problem Solving
GPOs are among the most cognitively sophisticated invertebrates known to science. They have demonstrated:
- Tool use — collecting and carrying rocks and shells to build dens
- Jar opening — learned behavior solving complex mechanical puzzles
- Individual personality — documented behavioral differences between individuals
- Play behavior — documented in research settings
At the Alaska SeaLife Center, our octopus residents receive enrichment activities daily — puzzles, prey hidden in containers, and novel objects — to engage their extraordinary minds.
Lifecycle
Despite their intelligence and complexity, giant Pacific octopuses live only 3–5 years. Females reproduce once in their lifetime, laying up to 100,000 eggs in a den. The female tends the eggs constantly for 6–7 months — not eating during this entire period — then dies after the eggs hatch. Males also die after mating.
The Octopus Encounter
One of our most popular visitor experiences — get up close with our giant Pacific octopus residents, learn about their biology, and watch them solve enrichment puzzles under the guidance of our expert aquarists.
Book the Octopus Encounter →