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Marine Life: Octopuses

Discover strange facts about octopuses: giant Pacific, common, blue-ringed, dumbo, and mimic octopuses, the eight-armed cephalopods with three hearts, blue...

6 articles
Octopus: Three Hearts, Nine Brains, Blue Blood
Octopuses

Octopus: Three Hearts, Nine Brains, Blue Blood

Octopuses have three hearts, nine brains, and blue copper-based blood. Expert guide to the most alien biology on Earth and why octopus intelligence works the way it does.

Oct 22, 2025 10 min read
Octopuses: The Alien Intelligence of the Ocean
Octopuses

Octopuses: The Alien Intelligence of the Ocean

Discover why octopuses are considered the closest thing to alien intelligence on Earth. Expert-written guide covering their three hearts, blue blood, distributed nervous system, instant camouflage, problem solving, and the science behind cephalopod cognition.

Oct 21, 2025 22 min read
Giant Pacific Octopus
Octopuses

Giant Pacific Octopus

Everything about the giant Pacific octopus: size, habitat, diet, intelligence, reproduction, conservation, and the strange facts that make Enteroctopus dofleini the largest octopus species on Earth.

Aug 14, 2025 16 min read
Mimic Octopus
Octopuses

Mimic Octopus

Everything about the mimic octopus: habitat, diet, behaviour, context-dependent mimicry, reproduction, conservation, and the strange facts that make Thaumoctopus mimicus the only animal known to impersonate more than a dozen species.

Jun 18, 2025 13 min read
Blue-Ringed Octopus
Octopuses

Blue-Ringed Octopus

Everything about the blue-ringed octopus: size, habitat, tetrodotoxin venom, iridescent warning pulse, reproduction, conservation, and the strange facts that make Hapalochlaena lunulata one of the most venomous marine animals on Earth.

Apr 20, 2025 13 min read
Common Octopus
Octopuses

Common Octopus

Everything about the common octopus: size, habitat, diet, intelligence, reproduction, conservation, and the strange facts that make Octopus vulgaris the most-studied cephalopod on Earth and a species complex of cryptic relatives.

Feb 19, 2025 19 min read