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Gallipoli, Canakkale, Turkey; close up of an octopus eye (Octopus vulgaris Cuvier, 1797). Generative AI

Octopus Intelligence Shakes Up Darwin’s Tree

There does not seem to be a Tree of Intelligence, which deepens the mystery of intelligence

(This article was first published in Salvo 64, Spring 2023, as Spineless Wonders.) The octopus presents a conundrum in animal intelligence: A highly intelligent invertebrate. We used to live in tidy world, where vertebrates, with backbones terminating in a brain, were more intelligent than invertebrates, with a variety of nervous system layouts and structures (or, in many cases, little or none thereof). Mammals and birds are, of course, highly favored for intelligence because they are warm-blooded (endothermic), and the brain is a high metabolic area. The traditional “tree of intelligence” makes sense, actually. But then we got to know the octopus. A “Second Genesis” Called by some a “second genesis of intelligence”, the octopus is the hero or perp of Read More ›

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Fresh uncut octopus on the market. Seafood counter in Sri Lanka.

If Octopuses Are Really Smart, Should We Eat Them?

Proposals to farm octopuses are meeting with opposition on grounds of animal cruelty

Extraordinary recent science discoveries re octopus intelligence have created an ethical dilemma: Octopus arms (tentacles) are gourmet delicacies in Korea, Japan, and the Mediterranean countries and many poor people make a living providing them. Factory farming is of octopuses is slowly becoming practical. But should we do to them what we wouldn’t do to dogs? Octopuses present something of a puzzle. As Canadian investigative journalist Erin Anderssen pointed out earlier this month, “The octopus has already challenged our theories on evolution, intelligence and consciousness.” Evolution? We have tended to assume that intelligence rose with the development of a spinal cord and brain (vertebrates), and warmbloodedness (mammals and birds). So invertebrates like octopuses were expected to be “naturally” less intelligent than, Read More ›