Underview of octopus arms featuring the suckers attached to the aquarium glass
Underview of octopus arms featuring the suckers attached to the aquarium glass

Arms all over

Don't compare them to the simple rubber suction cups on kids' toy dart guns; these have their own elaborate muscular regulatory mechanisms. This diagram illustrates the internal structure of a single octopus sucker.

There are two main regions, an infundibulum (IN) on the attachment face of the sucker, and a deeper chamber called the acetabulum (A) (if you don't recall any Latin, "infundibulum" just means "funnel", while "acetabulum" is "vinegar cup"â anatomy is littered with funnels and cup-shaped structures, so these are actually very generic names).

Built in 1978 and launched two years later, the frigate served Australia for 24 years before it was decomm
Built in 1978 and launched two years later, the frigate served Australia for 24 years before it was decomm

HMAS Canberra scuttled

Commercial clearance divers were expected to survey the wreck once it had settled later on Sunday to ensure all the charges had detonated.

Moorings will then be installed by Parks Victoria before the government opens the site for divers, in about a month's time.

Built in 1978 and launched two years later, the frigate served Australia for 24 years before it was decommissioned in 2005.

It served in the Middle East following the invasion of Kuwait by Iraq in 1992 and helped evacuate Australians from Jakarta in 1998 during the student riots that deposed Indonesian president Suharto.