Octopus
Octopuses vary greatly in size; the smallest, O. arborescens, is
about 5 cm (2 inches) long, while the largest species may grow to 5.4
metres (18 feet) in length and have an arm span of almost 9 metres (30
feet). The typical octopus has a saccular body: the head is only
slightly demarcated from the body and has large, complex eyes and eight
contractile arms. Each arm bears two rows of fleshy suckers that are
capable of great holding power. The arms are joined at their bases by a
web of tissue known as the skirt, at the centre of which lies the mouth.
The latter organ has a pair of sharp, horny beaks and a filelike organ,
the radula, for drilling shells and rasping away flesh.
Octopus
Octopus
Octopus
Octopus
Octopus
Octopus
Octopus
Octopus
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