around 90 and lack suckers altogether, are called cirri.

The tentacles of Decapodiformes are thought to be derived from the fourth arm pair of the ancestral coleoid, but the term arms IV is used to refer to the subsequent, ventral arm pair in modern animals (which is evolutionarily the fifth arm pair).

The males of most cephalopods develop a specialised arm for sperm delivery, the hectocotylus.

Cephalopod limbs

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