The giant Pacific octopus (Enteroctopus dofleini) is often cited as the largest octopus species. Adults usually weigh 10–50 kg (22–110 lb), with an arm span of up to 4.8 m (16 ft). [19]

Oct 31, 2025 · With around 300 species, octopuses inhabit every ocean on Earth, living in environments that range from shallow coastal waters to the deep seabed. Their size varies considerably with species.

Aug 29, 2025 · While the recently discovered Carnarvon flapjack octopus is a mere 2 inches across, some octopus species can grow to extraordinary sizes. So how big do octopuses get? Read on to …

Jan 21, 2026 · Octopuses vary greatly in size: the smallest (O. arborescens) is about 5 cm (2 inches) long, while the largest species, the reddish pink giant Pacific octopus (Enteroctopus dofleini), may …

Oct 9, 2023 · The largest known octopus in the world is the Giant Pacific octopus (Enteroctopus dofleini), which has been known to grow as large as 30 feet (9 metres) across!

Sep 1, 2025 · Understand the true complexity of octopus size. Learn why a single “average” is misleading, considering their diverse species and dynamic growth.

They're tiny and they're huge, but all octopuses are highly intelligent. Discover these amazing invertebrates of the seas.

Even though the giant Pacific octopus is the largest octopus in the world, it hatches from an egg the size of a rice grain. The tiny hatchling is just over a quarter-inch long and weighs 22 milligrams (less than …

The Common Octopus (Octopus vulgaris) camouflages itself by changing its color, then strikes at its prey by paralyzing it with nerve toxin. Considered the most studied species of octopus, it reaches a …

The common octopus (Octopus vulgaris), found along the east coast of the U.S., is much smaller, growing up to about three feet (0.9 meters). The red octopus (Octopus rubescens), found along the …