The giant Pacific octopus is the largest kind of octopus in the world. It has eight arms.

The suckers on its arms help it grip things and taste them. A female has about 2,240 suckers on her eight arms.

The only hard part of its body is its beak, which looks like a parrot's. It can squeeze through a very small space.

An octopus's skin has a top layer of pigment organs called chromatophores that make its colors. A giant Pacific octopus can change the color of its skin to blend in. It can also change the texture of its skin, raising bumps to match its surroundings. It also has sharp vision.

How smart is a giant Pacific octopus? Giant Pacific octopuses are smart: they can learn to open jars. They can tell individual people apart. A giant Pacific octopus has a well-developed brain.

Giant Pacific octopuses live in the Pacific Ocean, near the coast. They live from southern California north to Alaska and the Bering Sea, and across the Pacific to Japan. Each one lives in a den, a small hiding place in rocks or caves. They live alone and are not social animals.

They are mostly active at night, and they hunt at night. Their food includes crabs, clams, shrimp, scallops, snails and small fish. Few animals prey on a full-grown giant Pacific octopus. The main ones are large fish and marine mammals such as sea lions.

As of November 2026, giant Pacific octopuses are not considered at risk of dying out. The Georgia Aquarium lists them as Least Concern on the IUCN Red List. As of November 2026, conservation groups warn that climate change, pollution and fishing are growing threats, and that warmer water could disrupt egg development.

A giant Pacific octopus lives about 3 to 5 years. A female breeds only once in her life. She lays about 20,000 to 100,000 eggs in a den and stays with them, usually not eating, until they hatch.

The eggs take roughly 5 months to a year to hatch, depending on the water temperature. A baby is about the size of a grain of rice when it hatches. After hatching, the tiny octopuses drift near the ocean surface as plankton.

Words to know

• chromatophores: color cells
• texture: surface feel
• prey: hunt for food
• plankton: drifting life