Cephalopod intelligence

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Cephalopod intelligence is a measure of the cognitive ability of the cephalopod class of molluscs. Intelligence is generally defined as the process of acquiring, storing, retrieving, combining, and comparing information and skills. Though these criteria are difficult to measure in nonhuman animals, cephalopods are the most intelligent animals not to be vertebrates. The study of cephalopod intelligence also has an important comparative aspect in the broader understanding of animal cognition because it relies on a nervous system that is fundamentally different from those of vertebrates. In particular, the Coleoidea subclass (cuttlefish, squid, and octopuses) is thought to contain the most intelligent invertebrates. It is also thought to be an important example of advanced cognitive evolution in animals, though nautilus intelligence is also a subject of growing interest among zoologists. The scope of cephalopod intelligence and learning capability is controversial within the biological community...

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